Biology
Living systems, from cells to ecosystems.
Biology
Why do we get goosebumps?
A tiny muscle at the base of every hair yanks the hair upright when you are cold or startled — useful if you are covered in fur, and left over in us because we are not.
5 min read
Biology
Why do leaves change colour in autumn?
The yellows and oranges were there all summer, hidden under green — and the tree dismantles the green deliberately to recover the nitrogen locked inside it before dropping the leaf.
6 min read