Climate change is normal. In fact, the climate has been in flux for our entire evolutionary history.
We have witnessed two glaciations as a species and have experienced the Eemian Interglacial when conditions were similar to today (probably even warmer).
During the last glacial, about 25 percent of the world’s landmass was covered by ice. Today, only about 11 percent is covered by ice.
Where did all of the water come from to create that ice? From the oceans. During the last glacial, ocean levels stood about 130 meters (more than 426 ft) lower than today.
Talk about lower sea levels!
At about 6:55 in, look at the map and notice how most of eastern Italy was connected to Croatia. The Adriatic Sea didn’t even exist.
At about 8:35 in, notice the huge land bridge between Alaska and Asia. (I talk about this land bridge in Not by Fire but by Ice.) And contrary to what a lot people might believe, notice that most of Alaska was not glaciated.
At about 9:34 in, notice that the Philippines, Indonesia, Sumatra, Borneo, Java, Malaysia, Singapore, all were connected to each other and to the mainland.
Thanks to Winston Smith for this fantastic video