Posts Tagged ‘Richard Alley’

65 Million Years

December 20, 2012

Joanne Nova says our current “record heatwave” is far cooler than normal.

Of course she is talking about a time when dinosaurs roamed the Earth and our distant ancestor hadn’t even evolved. The planet and the life on it now are quite different – something climate scientists are well aware of.

Nova continues …

But, in terms of homo sapiens civilization, things are cooler than usual, and appear to be cooling.

No they’re not. Nova fails to get the basic facts right.

Homo Sapiens evolved about 250,000 years ago, during a glacial period when temps were several degrees colder. Since then the planet warmed, cooled and warmed again and on larger timescales where the rate of temperature change was far slower than rate of warming expected over the next century.

Only in the last few thousand years, when temperatures have been relatively stable, have homo sapiens flourished.