How does caffeine work?

SHORT ANSWER Caffeine blocks a sleep-promoting chemical and breaks into three molecules which stimulate your brain and body. FULL STORY Caffeine is

Why do eyes go bloodshot when you’re tired?

SHORT ANSWER Because your eyes get dry, causing irritation and redness. FULL STORY Human eyes are usually covered with a

SHORT ANSWER Bees and wasps are related, but not particularly closely. Nonetheless, wasps do like honey and other sweet things.

SHORT ANSWER Because blue is a rare pigment in nature and animals don’t find it appetising (so very few plants produce

SHORT ANSWER A lot of people think so, but there’s not much scientific evidence to support this theory. FULL STORY Local

SHORT ANSWER Possibly. Carrying extra weight makes moving a better “workout” – so it depends how much they use their

SHORT ANSWER They reach up with their front legs, grab on and use their momentum to swing their bodies up.

SHORT ANSWER Nearly 147 flat teaspoons. FULL STORY Sugar, or sucrose, is soluble and therefore will dissolve in any liquid. The

SHORT ANSWER Because salt water freezes at a lower temperature than fresh water. FULL STORY Observations from a ship which

SHORT ANSWER Refereeing decisions, testosterone levels and lack of confidence. FULL STORY Home advantage – meaning sports teams generally play