1. Brain

    Scientists Say: Confirmation Bias

    Confirmation bias is the tendency to seek out and believe information that agrees with what we already think.

  2. Animals

    Scientists still aren’t always sure why dogs wag their tails

    Your dog is wagging its tail. That must mean it’s happy, right? Maybe not. Scientists know less about what’s behind this behavior than you might think.

  3. Plants

    To spy this palm’s blooms and fruits, start digging underground

    Plants across 33 families are known for subterranean flowering or fruiting. But this palm is extremely rare. It does both.

  4. Physics

    Here’s why blueberries aren’t blue — but appear to be

    Blueberries actually have dark red pigments — no blue ones — in their skin. Tiny structures in the fruits’ waxy coat are what make them seem blue.

  5. Animals

    Here’s why thousands of octopuses gather at the ‘Octopus Garden’

    Underwater cameras and other instruments investigated why so many pearl octopuses gather here to mate and nest.

  6. Life

    Bacterial fossils exhibit earliest hints of photosynthesis

    Microscopic fossils from Australia suggest that some bacteria evolved structures for oxygen-producing photosynthesis by 1.78 billion years ago.

  7. Animals

    Pollen-seeking honeybees sometimes turn to theft

    Observations of honeybee pollen theft from bumblebees suggest it may be a crime of convenience, based on ease of access to the prized food.

  8. Animals

    Cats play fetch — but only when they feel like it 

    Most cats that play fetch pick up the behavior on their own, a study finds. And those felines tend to dictate when fetching sessions begin and end.

  9. Animals

    Which way is up? Insects may lose track near artificial lights

    Flying insects may use light to figure out where the sky is. But artificial lights can send them veering off course, high-speed video suggests.

  10. Plants

    Scientists Say: Marcescence

    Autumn turns to winter, yet some trees' dead leaves keep hanging on.

  11. Animals

    Reindeer can chew food in their sleep

    Brain waves and behaviors suggest that reindeer can doze while chewing.

  12. Animals

    Spiders that fall into water use reflected light to find land

    When elongate stilt spiders fall into water, they head for areas that don’t reflect light, studies show. This cue appears to signal dry land.