A nice example of convergent evolution? Not so fast....

 Puffer fish toxins probably come from their diet, and remarkably, pufferfish have gene mutations that make them resistant to the effects of the toxins. Furthermore, other species, like snakes, have evolved resistance to these toxins!

Article in the NYTimes

(Image from Wikimedia by Mila Zinkova)

Alien Invasion- a little off topic, but you might like this....

Who's the Boss?

A mindbending video about the effect of parasites on human behavior.

Bee Eaters

The Amazing Cataglyphis Ant

Why do female great apes (including humans) and female whales go through menopause?

It's about trading off between having new offspring, and investing in current offspring. I'd hazard a guess that it's more likely to evolve in cooperatively breeding groups with long lifespans....

Article on BBC
Read more about the "Grandmother Hypothesis"

Evidence of Sexually Selected Traits in Prehistoric Animals

Apparently many of the elaborate and bizarre traits found on "dinosaurs" were a result of either male-male competition or female choice!

Article on BBC