TE
科技回声
首页24小时热榜最新最佳问答展示工作
GitHubTwitter
首页

科技回声

基于 Next.js 构建的科技新闻平台,提供全球科技新闻和讨论内容。

GitHubTwitter

首页

首页最新最佳问答展示工作

资源链接

HackerNews API原版 HackerNewsNext.js

© 2025 科技回声. 版权所有。

Effect of a giant meteorite impact on Paleoarchean environment and life

133 点作者 kristianp6 个月前

6 条评论

dang6 个月前
The paper is at <a href="https:&#x2F;&#x2F;www.pnas.org&#x2F;doi&#x2F;10.1073&#x2F;pnas.2408721121" rel="nofollow">https:&#x2F;&#x2F;www.pnas.org&#x2F;doi&#x2F;10.1073&#x2F;pnas.2408721121</a>. We&#x27;ve adopted its title above.
kevinkeller6 个月前
I love this type of articles where we can reconstruct what happened so long ago just based on careful observations.<p>Some other instances I&#x27;ve come across:<p>* The K-Pg extinction event that wiped off dinosaurs had the impact it did because the asteroid happened to impact a shallow water region. This kicked up a lot of sulfur (in gypsum) that further affected global climate: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chicxulub_crater#Effects" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chicxulub_crater#Effects</a><p>* Earth likely had rings ~466M years ago. We deduced this by looking at impact craters from that time period, and seeing that they all lie near the equator (accounting for continental drift): <a href="https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0012821X24004230" rel="nofollow">https:&#x2F;&#x2F;www.sciencedirect.com&#x2F;science&#x2F;article&#x2F;pii&#x2F;S0012821X2...</a><p>* Earth&#x27;s rotation period was probably frozen at 21h, ~600M years ago, likely due to interaction between lunar and solar tides. This resonance could have been broken by ice ages (!!!). Amazing to think that global climate affects earth&#x27;s rotation: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Earth%27s_rotation#Resonant_stabilization" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Earth%27s_rotation#Resonant_st...</a>
评论 #42161612 未加载
评论 #42164711 未加载
评论 #42161822 未加载
评论 #42163600 未加载
Timwi6 个月前
The article perpetuates the widespread misconception that dinosaurs are extinct. In reality, (some) dinosaurs survived and evolved into modern birds. Everything from penguins to ostriches, hummingbirds to albatrosses and woodpeckers to eagles is a dinosaur.<p>Science communication should do better and clear up this misunderstanding.<p>It would be so much cooler to say that the asteroid killed the <i>pterosaurs</i>. Not only is it factually correct, it also opens doors to more curiosity. Why do they say pterosaurs instead of dinosaurs? Turns out they are separate clades. The pterosaurs, plesiosaurs and mosasaurs are all extinct as best as we can tell. The dinosaurs are not.
评论 #42164465 未加载
评论 #42163702 未加载
1970-01-016 个月前
Vote for Giant Meteor 2028!<p><a href="https:&#x2F;&#x2F;votegiantmeteor.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;votegiantmeteor.com&#x2F;</a>
hehehheh6 个月前
When is the next one coming? Or what is the probability distributuon like?
评论 #42167362 未加载
评论 #42161595 未加载
jeffbee6 个月前
The paper also mentions that, at the time, &quot;dinosaur killer&quot;-sized objects hit the Earth every 15 million years on average, which must have been sort of disruptive.
评论 #42161434 未加载