Environment
Ancient sharks saw the deep sea in colour
A primitive deep-sea fish, the elephant shark, is the oldest vertebrate to share the colour vision system of rods and cones with humans
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A primitive deep-sea fish, the elephant shark, is the oldest vertebrate to share the colour vision system of rods and cones with humans
Caterpillars mimic the noises made by ant queens to trick worker ants into protecting and feeding them, even at the expense of the ants own lives