FIRST MASS EXTINCTION • • • The extinction at the end of the Ordovician Period is the oldest of the “Big Five.” Animals had not yet conquered land at this time so the extinction was confined to life in the seas. There were two distinct extinctions roughly a million years apart. The first of these began about 443 million years ago. Together, these extinctions may have removed about 85 percent of species of marine animals. The evidence indicates that climate change caused the extinctions. A major
1:09
FIRST MASS EXTINCTION • • • The extinction at the end of the Ordovician Period is the oldest of the “Big Five.” Animals had not yet conquered land at this time so the extinction was
Cosmatrixx. Cosmatrixx · Original audio. FIRST MASS EXTINCTION • • • The extinction at the end of the Ordovician Period is the oldest of the “Big Five.” Animals had not yet conquered land at this time so the extinction was confined to life in the seas. There were two distinct extinctions roughly a million years apart. The first of ...
FacebookCosmatrixx已浏览 4 次11 个月之前
Ordovician Extinction
Ordovician-Silurian Extinction | Overview & Causes
6:32
Ordovician-Silurian Extinction | Overview & Causes
Study.com
已浏览 5.6万 次2020年12月14日
World facing first mass extinction since the dinosaurs
0:46
World facing first mass extinction since the dinosaurs
The IndependentPeter Stubley
2020年4月14日
Prehistoric Nature Ordovician Dimension
Prehistoric Nature Ordovician Dimension
curseforge.com
2023年7月12日
热门视频
Ordovician Period: Facts, Information, and Timeline
Ordovician Period: Facts, Information, and Timeline
a-z-animals.com
2020年10月21日
NEW Ordovician Fossils on Display!
0:46
NEW Ordovician Fossils on Display!
FacebookCincinnati Museum Center
已浏览 1015 次2022年9月26日
When Sponges, Trilobites, and Jawless Fish Ruled the Earth
When Sponges, Trilobites, and Jawless Fish Ruled the Earth
thoughtco.com
2017年3月9日
Ordovician Fossils
Suobuya, world's first Ordovician stone forest
0:14
Suobuya, world's first Ordovician stone forest
FacebookPeople's Daily, China
已浏览 8987 次2023年3月30日
Oldest Human Fossils
0:54
Oldest Human Fossils
FacebookNational Geographic
已浏览 60.7万 次2017年9月3日
Fossil collection at the University of California Museum of Paleontology | Britannica
3:35
Fossil collection at the University of California Museum of Paleontology | Britannica
britannica.com
8 个月之前
反馈