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  1. Archaeology

    12,000-year-old rock art hints at the Arabian Desert’s lush past

    Newly found engravings of animals on rock outcrops in Saudi Arabia’s Nefud desert show nomads lived there thousands of years ago.

    By Tom Metcalfe
  2. Physics

    Here’s what might spark ghostly will-o’-the-wisps

    Chemists have discovered tiny zaps of electricity moving between “swamp-gas” bubbles. Could they ignite methane gas to glow as dancing blue flames?

    By Laura Allen
  3. Health & Medicine

    Cancer uses mitochondria to reprogram neighboring cells

    Cancer cells transfer mitochondria through nanotubes to healthy neighboring cells, turning them into tumor-supporting accomplices, a new study shows.

    By Meghan Rosen
  4. Paleontology

    What may be one of Earth’s earliest animals has a punk rock vibe

    Squiggly markings like a punk rock hairdo led researchers to identify the remains as spongelike animals that may have lived around 560 million years ago.