Apply scientific ideas to construct an explanation for the anatomical similarities and differences among modern organisms and between modern and fossil organisms to infer evolutionary relationships.

  1. Fossils

    Where do humans come from?

    Some scientists propose a newfound South African species as the most likely ancestor of the line that led to humans. But not everyone accepts that this is where it all began.

  2. Animals

    The secret songs of giant beavers

    Scientists discover a noisemaking chamber in the extinct animal’s skull.

  3. Humans

    Mummies share their secrets

    Cutting-edge technology such as CT, or CAT, scans and endoscopes are allowing scientists to see not just what’s underneath the wrappings but also what’s inside a mummy’s body.

  4. Humans

    Old bones ignite fresh debate

    Scientists try to understand how 2 million-year-old fossils fit among ancient species.

  5. Fossils

    Dangerous dinos in the dark

    Eye fossils reveal predatory dinosaurs’ preference for hunting at night.

  6. Environment

    Busy bacteria leave big mark

    Earth’s earliest life-forms built mounds on an Antarctic lake bottom.

  7. Animals

    Eating can be skin deep

    In the laboratory, bottom-dwelling hagfish absorb nutrients through the skin.

  8. Health & Medicine

    Evolved to run

    Heel bones hint that humans could run farther than Neandertals.

  9. Fossils

    Big fish in ancient waters

    Fossils have revealed an ancient, oversized relative of modern-day swordfish.

  10. Fossils

    Dino bite leaves a tooth

    Meat-eating dinosaurs sometimes feasted on flying reptiles.

  11. Fossils

    Ancient critter caught shedding Its skin

    A fossil reveals that ancient animals shed their skin, just as insects and crustaceans do today.

  12. Fossils

    Dinosaurs grow up

    Learning how fast dinosaurs grew may help link birds to dinosaurs.