How many scientists here have heard of the Ice Ages? Raise your hands. Thank you.
An ice age is a long period of reduction in the temperature of Earth’s surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.
If “reduction in the temperature of Earth’s surface and atmosphere” creates an Ice Age – then what melts an Ice Age and/or makes that Ice Age go away?
Earth’s climate alternates between ice ages, and greenhouse periods during which there are no glaciers on the planet.
The oldest known Ice Age was the Huronian, which occurred between 2.4 and 2.1 billion years ago. How many scientists here believe that humans caused the Huronian glaciation to end? Over half of you. OK, over half of you got that one wrong.
The oldest known evidence of hominins—our early human-like ancestors—dates back to around 6-7 million years ago.
Humans weren’t around to melt the Huronian Ice Age, or any of the dozens that followed. I’m no scientist, but even I can spot that gap.
