What is a magnetar? A magnetar is a neutron star that is the size of a city but is one of the strongest magnetic objects in the universe. Many planets and stars have a magnetic field. Our Earth has a magnetic field that is produced by the spinning liquid metal in the outer core. The […]
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Why don’t spiders get stuck in their own webs? Spiders don’t get stuck because not all of the web is sticky, they know where to put their feet, and their feet are adapted for walking on silk. There may also be chemical help from their legs, but that part is still not completely proven. Spiders
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Why doesn’t the US control the Panama Canal anymore? The US doesn’t control the Panama Canal at the moment. It is owned and operated by the country of Panama. The US owned it until 1999. The Panama Canal is an 82 km long waterway that cuts through the narrowest part of Panama and connects the
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How did a gardener build the Crystal Palace? Joseph Paxton was head gardener for William Cavendish, 6th Duke of Devonshire, and an expert in greenhouses and large glass structures. When all other designs for the Crystal Palace were rejected, he submitted his own, which was chosen. The Crystal Palace was an enormous cast-iron and plate
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What causes a drought? At its simplest, a drought happens when an area has less water than it normally needs, often because of a lack of precipitation. Some droughts are meteorological, meaning there is not enough rain. Some are agricultural, meaning the soil is too dry for crops. Some are hydrological, meaning rivers, lakes, reservoirs,
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What was the Zimmerman telegram? The Zimmerman telegram was the device the US used as an excuse to join World War 1. World War 1 started in 1914 and lasted until November of 1918. The German forces moved quickly, but very soon, both sides were bogged down in trenches and it became a war of
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Why do some animals live in groups and others don’t? Prey animals that live in groups tend to do so for safety. Predators that live in groups tend to do so because it makes them better hunters. Some animals might also live in groups to keep warm, or because it makes it easier to find
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How does a revolving restaurant work? Only the outer dining platform rotates. The central core stays still. Revolving restaurants are usually located on the roof of buildings or at the top of towers. Diners can sit at tables around the outside of the restaurant and enjoy their meal as it slowly rotates. This allows them
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Are all birds waterproof? No, not all birds are waterproof in the same way. Some birds are extremely waterproof, some are only water resistant, and some have feathers that are partly wettable because that helps them dive. Birds that live on water usually need very good waterproofing. Ducks are a good example. Ducks can fly
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What causes a beer belly? A beer belly isn’t so much caused by beer as it is caused by excess calories, along with hormones and genetics that dictate where your body stores the fat. Our bodies have evolved to store any excess calories that we consume as fat. We are not the only animals to
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