Why don’t poisonous animals poison themselves? – TED Ed by Rebecca D. Tarvin

Thousands of animal species use toxic chemicals to defend themselves from predators. Snakes have blood clotting compounds in their fangs, the bombardier beetle has corrosive liquid in its abdomen and jellyfish have venomous, harpoon-like structures in their tentacles. But how do these animals survive their own poisons? Continue reading

Engineering, psychology and ‘lots of poo’: How NASA is tackling Mars mission’s mind-bending to-do list | CBC News

To make a crewed Mars mission possible, there are incredibly complex problems that need to be solved. Here are some of the things at the top of NASA’s to-do list, and how engineers and psychologists are figuring them out. Continue reading