Years ago I read The Jungle is Neutral and marvelled at Chapman's fortitude (waging a guerrilla war against the Japanese in the Malayan jungle), but I didn't realise he was also a bird watcher, Arctic explorer and Himalayan mountaineer.
Tiktaalik, a Devonian ancestor, and a damned important one.
We can't 'defend' against nature - it's not a war, and even if it was a war, we couldn't win it.
An academic takedown ... by a post-grad. Oh, about the math ... I'll take their word for it.