The world we live in is very different from the one that existed just 15,000 years ago. The first video below brings together a lot of disparate information and presents it as a whole concerning what Earth was like just before the end of the last Ice Age--lower sea levels exposing huge areas of land in Europe and South-East Asia and north of Australia that is, today, underwater. A green Sahara covered with grasslands, lakes, and a network of rivers. A dryer Amazon that was more open scrub land rather than impenetrable jungle. CO2 levels so low that many of the crops we use for food would not prosper.
Of course the Ice Age came to an end, but just as the Earth was warming, the Younger Dryas happened, throwing the northern hemisphere back into a deep Ice Age for 1,000 years before just as abruptly ending. The second video discusses some theories as to what caused the Younger Dryas including the Younger Dryas Impact Hypothesis (YDIH), although he leaves out one of the most important bits of evidence: the Carolina Bays and similar structures stretching westward into the heartland of America which record a wide swath of secondary impacts, likely from debris thrown out by the Younger Dryas Impact Event. Antonio Zamora has a YouTube channel devoted to studying the Carolina Bays and the YDIH which I recommend if you have further interest in the topic. Here is the link to an older video from Zamora covering the primary hypothesis that the Carolina Bays are evidence of an impact event.
VIDEO: "The Ice Age World You Don't See"
Curtis Holland | Reviewing the Record (21 min.)
VIDEO: "The Younger Dryas: The Last Great Mystery Before Modern History"
Curtis Holland | Reviewing the Record (21 min.)
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