There is something you should know about Louis Agassiz, this video only touched on it.
Besides being an avowed bigot, and abject hater of Charles Darwin, Agassiz was an evangelist who believed that God used reoccurring ice-ages to completely wipe out humanity and start all over again. His Thayer Expedition in 1865, and the Hassler Expedition in 1871, both of them to Brazil, was specifically to prove that theory. This is when so-called scientists imagined their own theories first, then went seeking the evidence to support it, also known as determinism. Which is as anti-science as it gets.
Boston, MA, Fields, Osgood, 1870. 8vo (21.9 x 14.3 cm). xxxiii, 620 pp., steel-engraved, tissue-guarded frontipiece, 73 text illustrations (including a few maps), one large, multi-folded map. Original blind stamped yellow cloth, with gilt title on…
www.biblio.com
naturalhistory.si.edu
The Quaternary Ice-Age is the fifth ice-age in Earth's 4.5 billion year history, and it began 2.58 million years ago. What the video does not mention is that ice-ages are comprised of repeating cycles of long glacial periods followed by brief interglacial periods. There have been just over 50 of these 100,000+ year-long glacial periods, with interglacial periods lasting between 5,000 and 25,000 years.
The last period of glaciation began 115,000 years ago, peaked between 23,000 and 27,000 years ago, and ended 11,700 years ago. The Holocene Interglacial period began 11,700 years ago. The previous interglacial period was called the Eemian, and it lasted from 130,000 to 115,000 years ago. It was also warmer than the Holocene has been. The Holocene Interglacial has been the coldest of the last four interglacial periods.
Source:
Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica - Nature, Volume 399, pages 429–436 (1999) [
free preprint]
