What is Younger-Dryas? Let's look at the charts:
The ice core in Antarctica can be drilled and it gives us the atmosphere report. Red is temperature, blue is co2.
Today is zero, way over to the right. Notice how much red we have had in the last 12,000. That red, temperature, tells us qe have been hot, at the hottest part of the glacial cycle. Compare the peak red with the previous four peaks.
How did we get stuck at hot?
Something called the Younger-Dryas event happened, and the new theory is that we got hit by a comet and remained hot. How? When ;listening to the theories, remember this:
Something stropped the melting of the ice, because the previous ice has to melt before we get cold and make more. Whatever triggers the ice ages is associated with a complete melting of the ice, and we only got a partial melt.
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