How have sea levels changed over time? Over the last 542 million years they have varied from 130 m lower than their level today to a theoretical 300 m higher than they are today. It is theoretical because the continents move around a lot, and it is difficult to find evidence for where the seas […]
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How does an octopus’s suction cup work? It reduces the pressure inside the sucker to create an extremely strong seal. Incidentally, I’m going with octopuses as the plural of octopus. Octopi is equally valid, but octopuses is apparently the more common term amongst the scientific community. Octopus comes from a Latin word and when Latin
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Why do shells form in different shapes? The environment and the biology of each living organism has caused their evolution to go in a slightly different direction. Most of the creatures that live in the sea and make shells are mollusks. They are soft-bodied creatures and use their shells as an exoskeleton. It gives them
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Is there any historical evidence for Jesus? Yes. There are a few mentions of him in other documents, but they all come from after he died. If you can ignore the biases in the Bible, then that is evidence as well. The vast majority of scholars believe that Jesus was a real, historical person. Yet,
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How much height does a parachute need? It completely depends on the type of parachute. We need to think about how long it takes a packed parachute to be released and inflate. Parachutes are packed into the backpack they are carried in and they are usually made of nylon these days. They used to be
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Do other planets have tectonic plates? In our Solar System, Earth is the only planet with tectonic plates, but in other solar systems there will probably be planets the same as ours. Out of all the planets in the Solar System, Earth is the only one with tectonic plates. Neptune, Uranus, Saturn, and Jupiter are
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How are memories stored? The brain stores them by altering the connections between neurons. The brains of all organisms that have them are made up of neurons, in different amounts. Our brain has approximately 100 billion of them. A neuron is a nerve cell and it is made up of three parts. In the middle
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What is the difference between a frog and a toad? There are many differences between the two, although toads are actually a type of frog, which makes it a bit like asking what the difference between a dog and a Labrador is. So, let’s start from the top. Frogs and toads belong to the order
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What is a jungle? It is generally an area of dense forest in a tropical climate. Many people think a rainforest is a jungle but they are different because a rainforest is a specific ecosystem, and a jungle is a description of an overgrown and tangled forest. The word “jungle” has come into English from
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Is a force field possible? In theory, there are several possibilities, such as warping space time, electric fields, directional lasers, a controllable plasma, a magnetic field, and others. We have all seen science fiction movies where a spaceship is protected by a forcefield that destroys enemy fire when it comes into contact. The recent movie
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