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Alpha keratin first evolves here; it is used in the claws of modern amniotes, and hair in mammals, indicating claws and a different type of scales evolved in amniotes (complete loss of gills as well). [20] Evolution of the amniotic egg allows the amniotes to reproduce on land and lay shelled eggs on dry land. They did not need to return to ...
The official San Diego Zoo YouTube account left a now-pinned comment on the video in 2020, stating that they felt honored being featured in the first-ever YouTube video. [23] As of October 22, 2024, it is the most-liked comment on the platform, with 3.9 million likes.
The first YouTube video, titled Me at the zoo, was uploaded on April 23, 2005, and shows co-founder Jawed Karim at the San Diego Zoo and currently has over 120 million views and almost 5 million likes. [15] [16] Hurley was behind the look of the website, creating the logo. [17]
On July 25, 1978, Louise Joy Brown became the first baby in the world to be born through in vitro fertilization. Known as the first “test-tube baby" — although the IVF process actually takes ...
At long irregular intervals, Earth's biosphere suffers a catastrophic die-off, a mass extinction, [9] often comprising an accumulation of smaller extinction events over a relatively brief period. [10] The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes.
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In the beginning, Amma dogon, alone, was in the shape of an egg: the four collar bones were fused, dividing the egg into air, earth, fire, and water, establishing also the four cardinal directions. Within this cosmic egg was the material and the structure of the universe, and the 266 signs that embraced the essence of all things.
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