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  1. Cosmology

    A century ago, Alexander Friedmann envisioned the universe’s expansion

    Alexander Friedmann saw that Einstein’s equations predicted multiple cosmic scenarios, including a Big Bang.

    By Tom Siegfried
  2. Life

    Caribou gut parasites indirectly create a greener tundra

    Caribou merely sickened by parasites eat less vegetation, allowing plants to flourish.

    By Jake Buehler
  3. Science & Society

    Why some scientists want serious research into UFOs

    Science grapples with unknown phenomena all the time. Investigating UAP and whether they're related to aliens shouldn't be different, researchers say.

    By Liz Kruesi
  4. Animals

    These dolphins may turn to corals for skin care

    For Indo-Pacific bottlenosed dolphins, rubbing against corals and sea sponges that contain antibacterial compounds could help keep skin healthy.