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  1. Paleontology

    Something mysteriously wiped out about 90 percent of sharks 19 million years ago

    Deep sediments beneath the Pacific Ocean revealed a mystery: a massive shark die-off with no obvious cause.

    By Carolyn Gramling
  2. Science & Society

    50 years ago, scientists predicted steady U.S. population growth

    The country’s annual population growth rate, mostly stable since the 1970s, is now the lowest it’s been in over a century.

    By Sujata Gupta
  3. Animals

    Newly recognized tricks help elephants suck up huge amounts of water

    New ultrasound imaging reveals what goes on inside a pachyderm’s trunk while feeding. It can snort water at the rate of 24 shower heads.

    By Sid Perkins
  4. Planetary Science

    NASA will be heading back to Venus for the first time in decades

    Two newly selected missions, VERITAS and DAVINCI+, will explore the history of the planet's water and habitability.