The Euler spiral has helped engineers for over 100 years – now we're using it to understand biology.
Whiskers are not just ordinary hairs. They are thicker and go deeper into the tiger's skin and send messages to its brain about what is happening in the world around it.
Blue Planet II reveals what fantastic predators they are.
A simple experiment with plastic straws, Lego bricks and a hair dryer is the basis for a future surgeon's sensitive tools.