Does the ozone layer still have a hole? Yes, the ozone layer does still have a hole, although it is slowly repairing itself. The ozone layer is not very thick, but it is vital to our survival on this planet. We talk about a hole in the ozone layer, but it is not an impenetrable […]
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What are curds and whey? The curds are the coagulated proteins from milk and the whey is the left over liquid. Cheese is a diary product made by coagulating casein, which is the milk protein. Making milk into cheese is a good way of making it last much longer because cheese doesn’t spoil as fast
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Why is the Mariana Trench so deep? The Mariana Trench is so deep because it has formed where the dense Pacific Plate has sunk underneath the less dense Philippine Sea Plate. The Mariana Trench is well known as the deepest point on Earth. Its deepest point is 10,984 meters. The pressure at that depth is
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How can astronomers detect planets? Astronomers can detect planets by seeing how they dim their stars, how they pull on their stars, and how they filter the light coming from their stars. So far, astronomers have detected 5,867 planets in 4,377 planetary systems. There are another 2,958 that haven’t been confirmed yet. That’ll bring the
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How do cities affect animal evolution? Animals have to evolve to survive in cities in numerous ways. They have to cope with the heat, the buildings, vehicles, different food sources, and many other things as well. In the history of our planet, urbanization is a relatively recent concept. The first cities appear to have sprung
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What is the Great Filter? The Great Filter is one of the possible explanations for why we might not find other intelligent life in the universe. It is a point at which no intelligent life can pass. You may have heard of the Fermi Paradox. I wrote an article about it before. Enrico Fermi was
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Why is there no cure for the common cold? There is no cure for the common cold because it is a virus and because there are so many different forms of it. The common cold is called the common cold because it is the most common of all the illnesses humans get. There is obviously
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Could teleportation be possible? In theory, teleportation could be possible, but in practice, it isn’t. When I say that something isn’t possible, I mean with current technology or the technology that is likely to be around in the future. There is obviously no way of knowing what kind of advances might appear in the future,
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What is the Boötes Void? The Boötes Void is an area of space 330 million light years across that only contains 60 galaxies. It is found in the constellation known as Boötes. It is sometimes called the “Great Nothing”. The Boötes Void was discovered by an astronomer called Robert Kirshner in 1981. He was looking
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Are cryonics possible? Cryonics might be possible in the future, but there is no way at the moment to imagine how it would be possible. The basic idea behind cryonics is that someone who is sick and cannot be healed by modern medicine is frozen when they die so that they can be revived at
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