evolution

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Will People Ever Evolve Out of Craving Unhealthy Food?

By PopSci on at

Maybe, but it's going to take a long time. For the past 200,000 years or so, fatty and sugary foods were hard for humans to come by and well worth gorging on. Fats help maintain body temperature, sugars provide energy, and craving such food is hardwired: Eating fats and sugars activates reward centers in the brain.

Why Don’t We Look Like Monkeys?

By Sam Gibbs on at

Simple -- evolution of course. But new research now suggests that the reason humans and apes don’t look alike in the face is down to facial expressions. We have plain faces, without varying colour and with less hair poking out everywhere, because it helps us track the complex facial contortions we use for communication.