There was a thread about humans in the 30th century and I responded to a post, then read thru the thread and wondered why I bothered. There is virtually zero intelligent discourse on that portion of this site..
On topic, I made a visit to Vegas earlier this year and just had to see the Hoover Dam. I marveled at how much of a drop from the top of the dam to the water below..turned out to be extremely relevant to climate change..
This was in 1983, when the Spillways were used.