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What Was the First Life on Earth?
March 01, 2017 | ArticleThe earliest evidence for life on Earth arises among the oldest rocks still preserved on the planet, dating back some 4 billion years.
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Why the Octopus Lost Its Shell
March 01, 2017 | ArticleThe ancestors of octopuses and squid once sported hard shells, but when did they lose their "mobile homes" and become agile, soft-bodied swimmers? A new study finds that this change may have occurred during the Jurassic and Cretaceous periods.
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The 18 Biggest Unsolved Mysteries in Physics
February 27, 2017 | CountdownThe more we learn about the universe, the more questions seem to arise. Our picks for the biggest open questions remaining in physics.
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Could a Spacecraft Fly to the Sun?
February 26, 2017 | ArticleHumans have sent spacecraft to the moon, the red planet Mars and even distant interstellar space, but can we send a spaceship to the scorching sun?
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Are Viruses Alive?
February 25, 2017 | ArticleViruses are infectious, tiny and nasty. But are they alive?
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Battle of the Sexes: Who Sweats More?
February 24, 2017 | ArticleDo men sweat more than women? Turns out, body size and shape is a better indicator of sweat than sex.
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What Does the Vice President Do?
February 19, 2017 | ArticleVice President Mike Pence has said that the United States would "hold Russia accountable" for their actions and would support NATO. But what authority does the VP have?
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What's the Oldest Thing Alive Today?
February 18, 2017 | ArticleThe oldest living thing on Earth today is … well, it's controversial. Figuring out the oldest thing alive requires defining "alive." It also requires a definition of "organism."
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Why Do Antiseptics Sting When Put on Cuts?
February 18, 2017 | ArticleImagine you're chopping vegetables when — oops! — you slice your finger. You run to the sink to wash the cut and then ready yourself for the inevitable sting that will come when you put antiseptic on the wound.
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Are Trees Vegetarian?
February 09, 2017 | ArticleHumans can be vegetarians, choosing to forgo meat, but what about trees? After all, trees need only soil, sunlight and water to survive, right?
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