Biology is just whatever worked

Have you ever looked at an animal and thought, “How does this thing survive this long?”. Well, the answer is simple… It’s just whatever worked for them.

Why do platypuses glow under UV light? Why does the blood lizard shoot blood out of its eyes? How can pandas still be alive if they just fall out of trees? And so many other questions… The answer is simple, they are like this because it’s what worked for them.