Today I learned that cuttlefish embryos have quite transparent eggs and like to spy on (ok, learn from) people through them, though by people I largely mean crabs. Some scientists are pretending they are going to show them videos of crabs and see if they learn from those too,  but we all know this will just end up as lab movie nights and then an intern will  teach them how to work a remote and they will turn into supergenius cuttlefish hackers that take over the world and bring peace, harmony and justice to all.

Oh and cuttlefish embryos change colour if you wave at them.