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oceanconservancy.org
23 Species are Now Declared Extinct
A new U.S. Fish and Wildlife proposal identifies 23 species that are extinct, meaning they can no longer be found on the planet.
Sep 30, 2021
Comet Neowise
0:15
Comet Neowise seen from Paris with noctulescent clouds. 2020 07 08
YouTube
Jean-Luc Dauvergne
11.5K views
Jul 8, 2020
0:26
What a sight!☄️ This timelapse shows Comet Neowise moving across the sky. | Al Jazeera English
Facebook
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Jul 14, 2020
0:13
When Comet NEOWISE visited us in 2020. Its closest approach to Earth occurred on July 30, 2020 at a distance of 0.69 AU (103 million km; 64 million mi). | Cosmoknowledge
Facebook
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480.9K views
Sep 13, 2022
Top videos
1:00
This planet has been radically affected by cosmic impacts throughout history - and we can't expect that it won't happen again. 66 million years ago: the dinosaurs went extinct. 12,800 years ago: the Younger Dryas impact reshaped civilization. 1908: Tunguska flattened 2,000 square miles of forest. 2013: Chelyabinsk, Russia. This is a pattern, not a coincidence. A recurring cycle that spans billions of years and shows no sign of stopping. If we actually understood the pattern - if we saw it for wh
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Why do comets never seem to run out of stuff? Like Halley’s Comet, how does it just keep coming back? Turns out, comets are massive. Some are tens of kilometres across, so there's a lot of material to vaporise each time they pass the Sun. But they do run out eventually! Roughly 6% of near-Earth asteroids might actually be extinct comets. These are comets that lost their tail and fizzled out. Only 10% of long-period comets survive more than 50 orbits. That’s about 10,000 years of cosmic flybys...
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