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How did metamorphosis evolve?While it might seem like an all-or-nothing process, insect metamorphosis likely emerged through gradual evolutionary changes.
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Were there female gladiators in ancient Rome?Rome is famous for its gladiators, but were any of these fighters women?
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What's the darkest place in the solar system? What about the universe?Space looks very dark from Earth. But does the solar system, and the universe for that matter, have an area that's the darkest of all?
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Why do European cities have milder winters than those in North America, despite being at the same latitude?London is at the same latitude as Calgary, Alberta. So why is the Canadian city about 15 degrees Fahrenheit (8.3 degrees Celsius) cooler in January?
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Can brainless animals think?Even without brains, creatures like jellyfish and sea anemones can learn from experience.
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Why does boiling water have bubbles, except in a microwave?Bubbles are usually the first sign that water’s coming to the boil, but heating it in a microwave seems to skip this important step. Here’s what’s going on.
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Which animals are tricked by optical illusions?It's not just humans who notice optical illusions; certain animals do too, and they often use it to their advantage.
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The Bering Land Bridge has been submerged since the last ice age. Will scientists ever study it?Humans likely left a lot of archaeological evidence along the Bering Land Bridge when they crossed from Asia to Alaska during the last ice age. But will we ever be able to dive down to examine it?
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Do people dream in color or black and white?Whether we report having dreams in color or in black and white may be influenced by the media we watch, or perhaps that simply influences the way we remember them.
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