Ancient Greek military ship found in legendary, submerged Egyptian city

Long before Alexandria became the center of Egyptian trade, there was Thônis-Heracleion. But then it sank.

  • Egypt's Thônis-Heracleion was the thriving center of Egyptian trade before Alexandria — and before earthquakes drove it under the sea.
  • A rich trade and religious center, the city was at its height from the six to the fourth century BCE.
  • As the city's giant temple collapsed into the Mediterranean, it pinned the newly discovered military vessel underwater.
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CT scans of shark intestines find Nikola Tesla’s one-way valve

Evolution proves to be just about as ingenious as Nikola Tesla

Credit: Gerald Schömbs / Unsplash
  • For the first time, scientists developed 3D scans of shark intestines to learn how they digest what they eat.
  • The scans reveal an intestinal structure that looks awfully familiar — it looks like a Tesla valve.
  • The structure may allow sharks to better survive long breaks between feasts.
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Watch the stunning "icy fingers of death" instantly freeze creatures

Strange underwater icicles form in the Earth's coldest regions and freeze living organisms in place.

Credit: United States Antarctic Program
  • Spectacular brinicles form under the ice of our planet's coldest regions.
  • Their formation resembles that of hydrothermal vents.
  • The structures have been called "icy fingers of death" because of their ability to freeze living organisms.
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More than half the world is still unmapped — but not for long

By the end of this decade, Seabed 2030 wants to produce accurate maps for the remaining 80 percent of the ocean floor.

Credit: Andrew Douglas-Clifford / The Map Kiwi. Reproduced with kind permission.
  • About 56 percent of the Earth's surface has not yet been mapped.
  • The uncharted area corresponds to 80 percent of the ocean floor.
  • But that area is shrinking fast. By 2030, the entire ocean will be mapped.
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Why are octopuses so intelligent?

The opening of jars, while impressive and often used to illustrate octopus intelligence, is not their most remarkable ability.

Photo by Qijin Xu on Unsplash
Our last common ancestor with the octopus existed more than 500 million years ago.
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