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Fact Mantis shrimp see differently, but probably not better Twelve colour receptor types to our three - and worse colour discrimination. 1 min read Fact Water is bizarre, and life depends on the bizarreness Almost every substance contracts when it freezes. Water expands. 1 min read Fact Space is not silent everywhere There is a real sound in the Perseus galaxy cluster - 57 octaves below middle C. 1 min read Fact One jellyfish can revert to a juvenile state Under stress, it does not die. It starts over. 1 min read Fact Some birds sleep with half their brain awake One eye open, literally, and it faces the direction danger comes from. 1 min read Fact The kilogram stopped being a physical object in 2019 For 130 years it was a lump of metal in a vault near Paris - and it was losing weight. 1 min read Fact Voyager 1 is the most distant human object and still talking Launched in 1977, running on less power than a kettle, replying after 22 hours. 1 min read Fact Tardigrades survived direct exposure to open space Vacuum, radiation, no water. Some of them then laid viable eggs. 1 min read Fact Bananas are clones and the last variety was wiped out It has happened before. It is happening again. 1 min read Fact Our galaxy is falling toward something we cannot see They named it the Great Attractor. It sits behind the Milky Way's own disc. 1 min read