What is the fastest insect? The fastest flying insect is the dragonfly and the fastest running insect is the Australian tiger beetle. The Australian tiger beetle is the fastest insect on land. It can run at 2.5 m per second, which works out to 9 km/h. That doesn’t sound terribly fast and most of us […]
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Why does the corpse plant smell so bad? They produce the scent of rotting meat to attract insects that feed and lay their eggs on decaying animals as pollinators. “Corpse plant” is just a nickname. The flower’s real name is Amorphophallus titanium, which is made up of the three Greek words “amorphos” (misshapen), “phallos” (phallic),
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When did people first use mirrors? People have been using mirrors since 8,000 years ago, but the modern mirror that we use today was invented in 1835. The first mirrors that people used were presumably puddles of water. Other than water, there are not really any natural mirrors. If we want to use a mirror,
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Why doesn’t honey spoil? Honey doesn’t spoil because it has almost no water in it, because it is a little acidic, and because it has antimicrobial compounds in it. When food spoils, it is usually because microbes like bacteria or fungi start to feed on it. The only goal bacteria have is to reproduce themselves
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How do snakes use their tongues? They flick them in and out to pick up chemicals off the ground and from the air. Snakes are not the only reptiles that use their tongues to detect things. Lizards have the same kind of tongue that they use to monitor the environment around them. A lot of
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How big could a plane or helicopter be? Theoretically, there is no limit so long as there is a strong enough material and enough thrust can be produced. Practically, there are no materials strong enough to make planes or helicopters much larger than they already are. The largest helicopter in the world at the moment
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What is the difference between volts, amps, ohms, and watts? Volts measure the difference in electrical force between two points. Amps measure the flow of electricity. Ohms measure the resistance of the material. Watts measure electrical power. The volt is named after Alessandro Volta, who built the first electric battery. Volta lived from 1745 to
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What are gallstones? They are hardened deposits of bile that can form in the gallbladder and cause problems. We need to start by looking at what the gallbladder is and what it does. The gallbladder is quite small and it is located just under the liver, at the bottom of the stomach. It is about
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What is fool’s gold? It is most commonly pyrite, which has a similar appearance to gold. The expression “fool’s gold” came into existence in the 1820s. The knowledge that there were other metals that looked like gold has probably been around for centuries, but it was only in the 1820s that gold rushes became a
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How did humans spread across the world? Generally, early humans moved around the world using land bridges or ice bridges. Occasionally, they may have used boats. The first migration happened before home sapiens had even evolved. Homo erectus evolved in central Africa at least three million years ago. This can be attested to by the
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