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28 gorgeous nebula photos that capture the beauty of the universeNebulas — colorful clouds of expanding gas and dust — have long captivated stargazers with their beauty. Here are 28 of the most stunning nebulas in the universe.
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Why do we go 'weak in the knees'?The saying "weak in the knees" may be figurative for many, but can it really happen to people?
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Do bay leaves actually add flavor, or is it all a con?Some say bay leaves are full of flavor, others call them a fraud.
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Is MSG bad for you?The case against MSG began with a letter to the editor back in the 1960s. But was there any truth to it?
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Which animals will be the first to live on the moon and Mars?Spaceborne animals could help humans survive on the moon or Mars. But which creatures would be the best for astronauts?
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Why does poop smell bad?And for medical purposes, how stinky is too stinky?
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How long will Earth exist?Humans will likely die long before our planet does.
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Why are things in space round?Why are most planets and moons (mostly) spherical?
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Do redheads really need more anesthesia?Redheads are said to experience pain differently than other people and require higher doses of pain medications, depending on the drug used. Why?
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Why is the sky blue?The sky's blueness isn't from reflecting the water. Instead, its color has to do with scattered light.
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Why do some people think cilantro tastes like soap?Here's the science behind why some people hate eating cilantro, which is also known as coriander.
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Genetically engineered pink pineapples are flying off shelves: What gives them their distinctive color?The food giant Del Monte has created a genetically engineered pink pineapple that owes its rosy hue to higher concentrations of a pigment called lycopene.
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Scientists finally figure out why cats are obsessed with tunaCats love tuna because it contains high concentrations of chemicals that make its umami taste receptors light up.
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How do mirages work?What are mirages and why does this optical phenomenon cause us to see reality differently?
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Should you really pee on a jellyfish sting?Is it fact or folklore that peeing on a jellyfish sting is a good way to treat it?
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15 dazzling images of the sunThe sun is Earth's closest star, yet its beauty is too intense to appreciate with the naked eye. Here are some of the most stunning solar images that our satellites and telescopes have captured.
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Does caffeine help or cause headaches?Caffeine's influence over headaches is complicated.
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Could a black hole devour the universe?Black holes can swallow stars, planets and even merge with other black holes, but could a massive one swallow the entire universe?
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How does water put out fire?Water extinguishes fire, but it doesn't act on the flames themselves.
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Could Earth be inside a black hole?And for that matter, could our universe be inside a black hole?
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How many people have died in space?Five missions have been fatal to space travelers.
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Why do people like spicy food?The chemicals that make food spicy don't target taste receptors, but rather temperature receptors in the tongue.
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How long can you go without sleep?And what can happen to your body if you stay awake way past your bedtime?
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How many moons does Earth have?To the naked eye, the night sky reveals only one moon. But how many moons have ever orbited Earth?
