Why do we have eyebrows?

Bushy or smooth, arched or straight. Eyebrows come in a range of shapes and sizes, and are vital cues to expressing our moods. They're pretty handy in the heat, too.

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Who really discovered calculus?

Isaac Newton and Gottfried Leibniz are the chief contenders for this textbook troubling mathematical tool, but maybe we should be looking further back to find the real answer.

Why are so many of us over-sensitive?

When a gentle glow feels like a spotlight and everyday sounds hurt your ears, life can get anxious and painful. But, discovers Emma Young, there may be an upside to being a highly sensitive person.

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