Toddlers laugh at your misery
Schadenfreude isn't just for adults anymore. Young children expressed joy at the bad fortune of others, bad fortune being defined as when water was spilled on the book that their mother was reading to a playmate .
Whiskers like fingers
Whiskers in other mammals might serve a purpose similar to our hands and fingers - rats were shown using their whiskers to navigate and avoid obstacles, depending on the novelty and complexity of the environment. Read about the study here.
Nests built of dead bodies
Bone-house wasps pile up dead ant bodies to protect their young, to deter predators and as olfactory camouflage. Fascinating!