Animals becoming nocturnal, cod comeback stumbles, mantis shrimp's brainy punch, drilling holes in skulls, to Pluto and beyond and why cereal sticks together.

Fear of humans is driving animals into the darkness - and nocturnal life; Newfoundland's cod comeback faces a setback - is fishing to blame?; The mantis shrimp's violent punches harness brains as well as brawn; Incan doctors scraped holes in skulls with stone tools - and the patients survived; To Pluto and beyond! The inside story of a mission to the edge of the solar system; Why do Cheerios stick together when they are floating in milk?

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