Post AmChu4VGAXNOSc3CIi by DocBohn@techhub.social
(DIR) More posts by DocBohn@techhub.social
(DIR) Post #AmCfzlVfV0NHNmpS5I by futurebird@sauropods.win
2024-09-20T18:50:35Z
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I’m making a 13.7 billion year long timeline with 5th graders mostly to teach them the difference in scale between billions and millions— but also to get them curious (I hope) about the way things bunch up and cluster together. I need more ideas for “significant events in the history of the universe/earth” Nothing too technical.
(DIR) Post #AmCgEHrlzkovmy5oUS by beans_please@mastodon.social
2024-09-20T18:53:09Z
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@futurebird dates when sharks, trees, jellyfish etc started showing up are pretty cool
(DIR) Post #AmCgHblWT0DqNEkjLc by michael_w_busch@mastodon.online
2024-09-20T18:53:47Z
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@futurebird The oxygen catastrophe at 2.46 - 2.06 billion years ago?The Earth's inner core freezing out somewhere between 2 billion and 0.5 billion years ago?
(DIR) Post #AmCgLHOi8VRsMVpjRg by futurebird@sauropods.win
2024-09-20T18:54:31Z
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@michael_w_busch That’s a good one add some snowball earths.
(DIR) Post #AmCgTFbChsy56JTgVE by Petprez@mastodon.world
2024-09-20T18:55:53Z
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@futurebird I love this one page chart, as it provides info on time, temperature, distance and the formation of subatomic/atomic particles, molecules, stars and galaxies. Hope it gives you some ideas.
(DIR) Post #AmCgaQAfnZ9nutUHQm by PrinceOfDenmark@mas.to
2024-09-20T18:57:12Z
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@futurebird Cambrian explosion was pretty cool.
(DIR) Post #AmCgcNMvBlqnnv9Goy by katzenschiff@chaos.social
2024-09-20T18:57:14Z
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@futurebird sharks 420 million years agoTrees 370 million years ago Day off work to brew beer: 3250 years ago
(DIR) Post #AmCgeclstRPU9atfWq by F100@mastodon.social
2024-09-20T18:57:38Z
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@futurebird planets form, moons form, first life forms, first dinosaurs, last dinosaurs, first mammals, first humanoids, oceans covering N America retreat, ice ages, first ants.
(DIR) Post #AmCggtBEr8sPclptU8 by powersoffour@mastodon.social
2024-09-20T18:57:45Z
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@futurebird I don't think this is necessarily too technical, but it might be. The era of reionization, when the universe became transparent ("optically thin") in visible light and once again visible to a human observer, is a really cool concept. It lends itself really well to demonstrations of the way stars and galaxies formed.https://www.youtube.com/watch?v=kifF3RYcfn0This is a viz of a simulation of reionization and it's really evocative. (We simulate universes as periodic cubes, thus the boxiness.)
(DIR) Post #AmCgl54qZ8FdgEqScS by msbellows@c.im
2024-09-20T18:59:11Z
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@futurebird When Earth lost its Saturn-like rings: https://www.space.com/ancient-earth-ring-system-asteroid-breakupWhen our ancestors first crawled out of the oceansWhen the ancestors of cephalopods wisely fled back into the oceansWhen your students were born vs when their parents were born (which will be an infinitesimal difference, which is the point)
(DIR) Post #AmCgnd1RKVPHXQSyFE by Scmbradley@mathstodon.xyz
2024-09-20T18:59:27Z
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@futurebird you probably already do this bit, but what brought home the difference between million and billion for me is that a million seconds is about 12 days, a billion seconds is about 32 years.
(DIR) Post #AmCgt66SdPqpBAQGdU by Petprez@mastodon.world
2024-09-20T19:00:34Z
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@futurebird This one may be kinda cool from an earth timeline perspective, but maybe focus on the development of different forms of life instead of mass extinction events for kids 🙂
(DIR) Post #AmCgx8wC2RmH80Y6ym by rubinjoni@mastodon.social
2024-09-20T19:00:43Z
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@futurebird Earth's First Billionaire (in today's money)?
(DIR) Post #AmCgzCB8xWCJl9WLPk by StephanMatthiesen@troet.cafe
2024-09-20T19:01:07Z
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@futurebird I tried a timeline of Earth (since it's formation) as a boy on a strip of paper on my bedroom wall (about 3 metres). I found out quickly that anything I knew of (dinosaurs and such) bunched up on the last few centimetres and human history didn't even fit (a millimetre being around 1.5 million years). A teacher then told me about logarithmic scale. I learned a lot so this sounds like a brilliant idea for your class!
(DIR) Post #AmCh5TSzb0c179rak4 by CStamp@mastodon.social
2024-09-20T19:02:43Z
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@futurebird Something like this, which includes dinosaurs? https://www.dynamicearth.org.uk/geological-timeline-pack.pdf
(DIR) Post #AmChDvu3klcBcqYbgG by futurebird@sauropods.win
2024-09-20T19:04:23Z
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I also have a student who is insisting on writing the current year as 13,700,002,024 which… I guess it’s fine that date of the big bang isn’t precise enough to do that but it puts things in perspective I suppose.
(DIR) Post #AmChMbY0nveJ6GNb0a by Aviva_Gary@noc.social
2024-09-20T19:05:33Z
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@futurebird these comments are great (I came here for them and I was not disappointed) but it would depend on what events you wanted to addlike these are all serious but if you wanted to do a silly chart you could have things like the difference between the parents and the kids (like the one poster said) or compare it out like a calendar 🤔
(DIR) Post #AmChUvqdDD8oNR3kfY by DoesntExist@mastodon.social
2024-09-20T19:07:10Z
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@futurebird 5 major extinctions at445 Ma372 Ma252 Ma201 Ma66 MaAlso the Brontosaurs was farther back in time from the T-Rex than the T-Rex is from us right now.We tend to just think "dinosaurs, all at the same time."
(DIR) Post #AmChWsVCcctca0xqZE by adriano@lile.cl
2024-09-20T19:07:33Z
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@futurebird sounds like the kind of guy that tells you his body temperature in Kelvin
(DIR) Post #AmChi3vOUgcDBvY36W by MagentaRocks@mastodon.coffee
2024-09-20T19:09:49Z
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@futurebird Love it! A non-conformist in the making. ;)
(DIR) Post #AmChu4VGAXNOSc3CIi by DocBohn@techhub.social
2024-09-20T19:11:52Z
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@futurebird Thanks to the Y10K problem, we're stuck with just the least significant 4 digits
(DIR) Post #AmChwngRA1jZADa0ga by mcc@mastodon.social
2024-09-20T19:12:04Z
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@futurebird Creation of moon, 4.5 billion years ago.One of the things that's most interesting to me about the "galactic" timeline is (another person's chart points this out too…) how many interesting things happen within like, twenty minutes of the big bang. I think most of these details are too technical or if described plainly might mislead a grade school student ("matter/antimatter war completes, matter wins") but there are two things I think are of note:
(DIR) Post #AmCi9qCH7vIiiwgqUS by Timpostma@mastodon.world
2024-09-20T19:14:50Z
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@futurebird what my #teachers taught me as a child is first off slots for a decimal & how to sort it also I had bocks for sq area & cubic volume #math
(DIR) Post #AmCiC7p8YtANyIxN8i by hattifattener@wandering.shop
2024-09-20T19:14:38Z
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@futurebird Space stuff: atomic matter condenses out, first stars form, our star forms, something whacks the Earth to make the Moon, the Late Heavy Bombardment
(DIR) Post #AmCiFuoYs7L4mZUjMu by marshray@infosec.exchange
2024-09-20T19:15:57Z
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@futurebird Late heavy bombardment? Brought dense minerals like gold to the surface.
(DIR) Post #AmCiY4wzvP8XQo6MqW by mark@mastodon.fixermark.com
2024-09-20T19:19:10Z
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@futurebird Across 13.7 billion years?The Oxygen Catastrophe lasted from 2.460 billion years ago to 2.060 billion years ago. Life producing oxygen with no life in the ecosystem consuming that oxygen nearly poisoned life on Earth. The reason it took so long is that Earth is big, so it took that long for the oxygen to build up to toxic levels (it had a whole planet's surface to rust, which ate some of the oxygen).Life was saved by the evolution of organisms that could consume the oxygen in their metabolism, but life was able to adapt because there were 100s of millions of years to do so...
(DIR) Post #AmCihG2K4qUCQ5y9dw by GustavinoBevilacqua@mastodon.cisti.org
2024-09-20T19:20:44Z
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@futurebird A teacher I knew used a 5 meters roll of millimeter paper hanging on the wall to teach the recent history (1mm = 1 year), with pins holding notes about important events.
(DIR) Post #AmCitE1xMR4nfpVL5U by oliversampson@sigmoid.social
2024-09-20T19:22:52Z
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@futurebird Humans almost died out twice:https://www.smithsonianmag.com/science-nature/genetics-suggest-our-human-ancestors-very-nearly-went-extinct-900000-years-ago-180982830/https://www.npr.org/sections/krulwich/2012/10/22/163397584/how-human-beings-almost-vanished-from-earth-in-70-000-b-c
(DIR) Post #AmCivM4KRhPFBPd66y by jztusk@mastodon.social
2024-09-20T19:23:17Z
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@futurebird @michael_w_busch Y'know those maps where the show how many other continents & countries can fit into Africa? Show how many other eras can fit into the big snowball period.
(DIR) Post #AmCix3cfzyGoYLVVj6 by thedansimonson@lingo.lol
2024-09-20T19:23:23Z
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@futurebird I drew this a few years back and have it for quick reference on my phone—got tired of hearing “100 million years ago” and wasn’t sure what that entailed exactly.
(DIR) Post #AmCjOW70BVpIjGmlI8 by futurebird@sauropods.win
2024-09-20T19:28:37Z
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@thedansimonson Frankly I need to look at this sort of thing when I wake up just to keep everything straight.
(DIR) Post #AmCjsi0gVp5CJmE9LM by mcc@mastodon.social
2024-09-20T19:15:45Z
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@futurebird 1. First stars, 100 million years after the big bang2. If a grade school student is ready for this idea, it's very interesting to me that because of the speed of light, the further away we look in distance the further back we look in time. And if you get too far back, you can't see anything, because the pre-star-formation, neutral-hydrogen era is just opaque! I think it's interesting if you look too far back in time there's a literal cloud you can't see through.
(DIR) Post #AmCjsip1UfLgptmLo0 by mcc@mastodon.social
2024-09-20T19:21:42Z
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@futurebird …I think I described that iffily. This is the book I'm summarizing (it's good, but it's from 2009 so it seems possible it's at least a little outdated by now)
(DIR) Post #AmCkGUIN9f3YjTq5YW by johnzajac@dice.camp
2024-09-20T19:38:25Z
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@futurebird Baryonic Acoustic Oscillations are basically acoustic waves that caused the first stars to form, and we can still see their physical impact in today's universe Someone just discovered the largest structure in the universe so far and it's a spherical hyper-density of galaxies that's the remains of a BAO and clocks in at >1B light years in diameter.https://www.scientificamerican.com/article/ho-oleilana-a-billion-light-year-wide-bubble-of-galaxies-astounds-astronomers/
(DIR) Post #AmCkQorbXNW1Q5FGKG by mick@cosocial.ca
2024-09-20T19:40:19Z
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@futurebird 4.54 billion years ago - the Earth is formed.Also:6000 years ago - the Earth is formed.
(DIR) Post #AmCkSYfciM6TmCTDe4 by futurebird@sauropods.win
2024-09-20T19:40:27Z
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@johnzajac Ugh that so lorge
(DIR) Post #AmCkf6WefPCgFgG2gC by johnzajac@dice.camp
2024-09-20T19:42:54Z
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@futurebird Haha I just think it's neat that it was sound waves that pushed recombined hydrogen atoms together and started the process of them collapsing into the first stars. It's like the universe only exists because of cosmic music.
(DIR) Post #AmCktTySHbrF1v7KDI by msbellows@c.im
2024-09-20T19:45:27Z
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@futurebird Okay sure that's cool etc etc but is that 13,700,002,024 CE or 13,700,002,024 BCE?
(DIR) Post #AmClQkAT60fgoIb2DQ by stevegis_ssg@mas.to
2024-09-20T19:51:31Z
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@futurebird Well this sounds like a teachable moment for significant digits!
(DIR) Post #AmClSLhX28wXVVpKzo by Jesticulated@mastodon.social
2024-09-20T19:51:06Z
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@thedansimonson @futurebird love these notes! Is this a correct read that there are no fossils records of dinosaurs before 250 million years?
(DIR) Post #AmClfd4hkXUX9hzxsO by sophieschmieg@infosec.exchange
2024-09-20T19:54:08Z
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@futurebirdIt just covers the history of Earth, but I really like this 4 billion years compressed in one hour kurzgesagt video for that. Unfortunately, the vast majority of time is occupied by the boring billion. https://youtu.be/S7TUe5w6RHo?si=bkw4LX5cEjQ0qTlL
(DIR) Post #AmCmnbXPRq14ewn8sq by pauldrye@spacey.space
2024-09-20T20:06:45Z
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@futurebird Filling the era before the Ediacaran is hard. Let's see:Last Universal Common Ancestor of all extant life is no more than 3.6 billion years ago, and it keeps getting pushed back."Earth" and another planet collided and vaporized c.20 million years into our history. Most condensed into "real Earth" and some became the Moon.The oldest proposed continent is Vaalbara, 3.6 gya and The Late Heavy Bombardment ended approximately 4.0 gya, but they're not sure either actually happened.
(DIR) Post #AmCnBTUP1X08eCldfk by JBrianCoyle@mas.to
2024-09-20T20:10:54Z
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@futurebirdNeil deGrasse Tyson calendar for aome insipration.https://youtu.be/ASw5jsajH6k?si=O3lx1GKtPOawM1t1
(DIR) Post #AmCnno7uk8NtenWk88 by aprilfollies@mastodon.online
2024-09-20T20:18:05Z
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@futurebird Formation of our Milky Way about 12 billion years ago Formation of the solar system, 4.55 billion years ago Formation of Earth and Moon via giant impact, 4.5 billion years ago
(DIR) Post #AmCo0etcNDVonFy4zw by AnnaAnthro@mastodon.social
2024-09-20T20:20:03Z
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@futurebird fyi
(DIR) Post #AmCq277N8A48WIDtIG by MossyQuartz@social.vivaldi.net
2024-09-20T20:43:04Z
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@futurebird Another thing my parents pointed out to us kids was the different ways mountains formed, where we could see sedimentary formations in rock had ended up as diagonal stripes now visible after roadways had been cut through hillsides. I also saw inactive volcanoes and tried to understand how continents can move/change.
(DIR) Post #AmCra0OcjDHRTN173Y by Trifolium@c.im
2024-09-20T21:00:21Z
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@futurebird LUCAhttps://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1007518
(DIR) Post #AmCrqvgzTCGlo6g5p2 by aenea@paquita.masto.host
2024-09-20T20:17:03Z
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@futurebird The whole beginning of Cosmos is exactly that timeline
(DIR) Post #AmCsQanqc6UZRdtHyS by TashTaylor@sauropods.win
2024-09-20T21:09:53Z
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@futurebird Not only is the uncertainty a bit high, but that date is actually prior to K-Pg extinction to the precision we do know it, 13.787 ± 0.020 Ga (to the best of my knowledge). I'm sure they'll be excited to find they've been in the Cretaceous all along!
(DIR) Post #AmCtqIGCHGjtQ1yCVU by WhiteCatTamer@mastodon.online
2024-09-20T21:25:45Z
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@futurebird Two points:1. The evolution of the eye: about 500 million years ago: https://www.scientificamerican.com/article/evolution-of-the-eye/2. The oldest human observed supernova: 185 AD in China.You can have them walk from the development of the eye to the first known time that eye observed one of the most spectacular things in the universe.
(DIR) Post #AmCuZxs0Q675V6Qryq by Sibshops@mastodon.online
2024-09-20T21:33:58Z
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@futurebird Ah the year in Kelvin
(DIR) Post #AmCwBowg9LR2mPEWI4 by ThreeSigma@mastodon.online
2024-09-20T21:52:01Z
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@futurebird Formation of the moon is a good one.
(DIR) Post #AmCxYYjCiAUX65Kwj2 by Chip_Unicorn@im-in.space
2024-09-20T22:07:21Z
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@futurebirdA few ideas:Life beganFirst eukaryoteFirst multicellular lifeFirst plantFirst animalDinosaurs!First mammal (before the dinosaurs)First primateFirst homo sapiens Taylor Swift
(DIR) Post #AmCxqoLFOnwWjapnXs by JonnyT@mastodon.me.uk
2024-09-20T22:10:39Z
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@futurebird @lisamelton One to ponder, especially if you know anything about about growth curves in bacterial cultures and what happens when one or more resources is fixed:The 10s of thousands of years for the human population to reach the 1 billion people mark in what is estimated to be the early 1800s. In about 200 years it has increased by almost an order of magnitude and is now approaching 10 billion.
(DIR) Post #AmCzWt1WTxQPN6EfCa by Wlm@mastodon.gamedev.place
2024-09-20T22:29:30Z
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@futurebird The galactic year is a weird intermediate timescale: ~225 million years to orbit our galaxy. So one of these ago was early dinos, and there’s only been a few dozen ever.
(DIR) Post #AmCzZBgu32tnqYgiPo by bws@social.linux.pizza
2024-09-20T22:29:40Z
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@futurebird for the "last" part some inspiration: https://xkcd.com/1732/
(DIR) Post #AmD0AUMfaC3gTc0iVE by philbetts@mastodon.social
2024-09-20T22:36:38Z
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@futurebird there was an academic at my old uni who essentially came up with a new field - Big History. The Big Bang to present day. I think it would be very relevant, and there's a bunch of Open Education Resources: https://www.oerproject.com/Big-History
(DIR) Post #AmD1H8K02KlO5nUgDo by bitsnpieces@mastodon.social
2024-09-20T22:49:03Z
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@futurebird In the beginning, God exploded. We're living in his bits and pieces.
(DIR) Post #AmD1c4p4EyrbK20or2 by AnarchoNinaWrites@jorts.horse
2024-09-20T22:52:50Z
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@futurebird May 2, 1989
(DIR) Post #AmD1i1kuYZnBXzuD6e by dinogami@sauropods.win
2024-09-20T22:53:51Z
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@futurebird I have a similar exercise that uses a 100 ft. cloth tape measure to represent 4.6 billion years of Earth history. I have a spreadsheet of events, when they occurred, and the conversion of where each of those events lands on the tape measure, and I have laminated signs taped to lawn staples for each event. The students gather the signs, consult the chart, then place them at their distances. It's not 13.7 billion years, but if you want the files, I think I have them somewhere.
(DIR) Post #AmDCbxF1WjHlIxIUgy by minusavenue@mstdn.social
2024-09-21T00:56:03Z
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@futurebird That Time We Got Hit By A Rock And Gained A Companion... assuming you agree with the giant-impact theory 😉 but I think "before there was a moon" would be interesting.
(DIR) Post #AmDDqcNBUsxksefcnI by zrb@astrodon.social
2024-09-21T01:09:56Z
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@futurebird how about the insanely long time that we think unicellular life existed, vs the relatively short time of multicellular life?
(DIR) Post #AmDFzjhlo2DY8Qm6BU by futurebird@sauropods.win
2024-09-21T01:33:58Z
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@zrb Oh we've got that. It's my secret plant to worry enough young people with this puzzle that one of them goes into palentobiology and solves it before I die.
(DIR) Post #AmDG48f2xhFch2bHLE by catselbow@fosstodon.org
2024-09-21T01:34:40Z
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@futurebird Like the Kurzgesagt Human Era calendar, where this is 12,024.https://shop-us.kurzgesagt.org/collections/calendar
(DIR) Post #AmDGiNTdIPbeE9RtRY by jik@federate.social
2024-09-21T01:42:03Z
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@futurebird How is there nothing here about ants.https://expeditions.fieldmuseum.org/australian-ants/ant-evolution-and-environment
(DIR) Post #AmDHrkxPSxgNbuPehU by martingb@mas.to
2024-09-21T01:54:58Z
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@futurebird @gemelliz invention of the bicycle, the car, electricity, the internet, last ice age, evidence of first homo erectus,
(DIR) Post #AmDifvdSdWCe12fNj6 by peturdainn@mastodon.social
2024-09-21T06:55:22Z
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@futurebird xkcd has some great ones I think, certainly one about global warming
(DIR) Post #AmDmD8nf0mtcGOxw1o by urlyman@mastodon.social
2024-09-21T07:34:58Z
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@futurebird they might enjoy this (2 threaded posts) https://mastodon.social/@urlyman/111692740120805088
(DIR) Post #AmDp30oO9mRcSHAU1A by becha@social.v.st
2024-09-21T08:06:45Z
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@futurebird earth temperature timeline by xkcd has good points :: https://xkcd.com/1732/
(DIR) Post #AmDpBPwCcfGQhNpa1w by becha@social.v.st
2024-09-21T08:08:14Z
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@futurebird “putting time in perspective” is one of my favorites - with a pretty poster https://waitbutwhy.com/2013/08/putting-time-in-perspective.html
(DIR) Post #AmDq7nE4CCtrin1Rom by becha@social.v.st
2024-09-21T08:18:49Z
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@futurebird please share the results once you have them!
(DIR) Post #AmDuY31aTkOg49xa76 by Gobabu@mastodon.social
2024-09-21T09:06:58Z
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@Jesticulated @thedansimonson @futurebird You can't have fossils records of dinosaurs because the recording music is fairly recent.You can sometimes find fossilized dinosaur musicals as librettos (libretti?) and music scores in museum collections, but good luck playing a three tons violin...🎻 🐊 ⁉️
(DIR) Post #AmDzZeJznL8Lni9ZSK by alec@perkins.pub
2024-09-21T10:04:38Z
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@futurebird the formation of particular mountain ranges would be neat, with maps of the continents in there positions at the time. Also when light from a notable distant star that is just arriving now left its source, or maybe a galaxy like Andromeda (2.5M). There was also a gamma ray burst in 2008 that came from 7 billion lightyears away.
(DIR) Post #AmGtSgimSR1oxvvJgW by gannet@wandering.shop
2024-09-22T19:40:20Z
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@futurebird When the moon was formed.
(DIR) Post #AmGuoAi2G3vA0VNo8G by benchaotica@mastodon.nz
2024-09-22T19:55:25Z
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@futurebird The first rain fall on earth. (~4B years ago)https://mymodernmet.com/rain-zircon-earth/For fossil fuel background: the first lignin-having plants, vs the first lignin-eating species.In the universe, maybe the first second generation stars?
(DIR) Post #AmGuqXW4Quh9JxupOK by sashin@veganism.social
2024-09-22T19:55:54Z
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@futurebird This is really cool! I honestly had no idea you were a teacher.Have you seen the famous Bill Wurtz video?https://blueberry.invidious.reallyaweso.me/watch?v=xuCn8ux2gbsYou could show it to them and pick events to put on the timeline!
(DIR) Post #AmGv4Cqw3XepHxBx0S by gannet@wandering.shop
2024-09-22T19:58:19Z
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@futurebird I don’t know if times when the magnetic poles flipped would be too technical?https://en.wikipedia.org/wiki/Geomagnetic_reversalWhen plate tectonics started (there’s argument)https://en.wikipedia.org/wiki/Plate_tectonics
(DIR) Post #AmH5FzMr1DJmTvNWuu by AMS@infosec.exchange
2024-09-22T21:52:30Z
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@futurebird Log scales might be a good way to go. They're about the right age to start noticing that time is going subjectively faster (summer break seems shorter etc.) So you can do day, month, year, their life, the USA, major religions, writing, humans, dinosaurs, etc.
(DIR) Post #AoJBLUXi3Tq9gbBfE0 by goinfawr@mstdn.social
2024-11-22T17:54:22Z
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@futurebird Haven't checked all the replies, but two events changed history 4 evah:-agriculture-soap