At 5 am in a wildlife park, yawning zookeepers are a common sight. Turns out, so are yawning elephants.
Picture Wednesday: Plasma tubes | Day 290
For over 60 years astronomers believed that there are plasma tubes in the Earth’s magnetosphere. Then, a young astronomy student found them. This is what they look like.
Surface tension | Day 209
Surface tension is a concept that crops up in conversation from time to time. So what is it exactly, and what does soap have to do with it?
The humans were long gone | Day 166
What if we all just disappeared one day? What of the animals, what of the cities?