Did ancient cave artists share a global language?

The same 32 symbols show up in prehistoric European cave art.

Photo credit: PIERRE ANDRIEU / AFP / Getty Images
  • Many of these symbols are found in caves in Africa, Asia, Australia and America as well.
  • At least 40,000 years old, the set of symbols may have been a universal communications tool.
  • Among these symbols is the iconic hashtag.
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New tech 'MERMAIDS' can detect earthquakes before they wreak destruction

A network of devices called MERMAIDs is taking seismographs where they've never been.

(Princeton University)
  • Most of the ocean floor is inaccessible to seismologists.
  • Much can be learned about the interior of Earth by listening to earthquakes.
  • Ingenious new floating sensors are changing the ocean seismology game.
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Elon Musk interview reveals whether he prefers Nikola Tesla to Thomas Edison

In 2008, Elon Musk explained which of history's tech geniuses was his role model.

  • In 2008, Elon Musk told an interviewer about his role models.
  • His father had less of an influence than has been reported.
  • Musk was a fan of both Edison and Tesla but preferred Edison.
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The future of male contraceptives? A layered cocktail.

"Dinner and drinks" may take on a new, more provocative meaning.

Photo credit: Peter Ruck / BIPs / Getty Images
  • Scientist propose a layered cocktail as a future male contraceptive.
  • Chemical layers block the flow of sperm and can be dissolved with near-infrared light.
  • Tiny umbrella not included.
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    10 best books for entrepreneurs and inventors

    Foundational business books for success.

    Fifty Inventions That Shaped the Modern Economy, by Tim Harford

    • Explore the 50 inventions that made the modern world.
    • There is rich advice in the literature of start-up development.
    • Learn about the interconnectedness of innovation and business development.
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