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  1. Animals

    How do we know what emotions animals feel?

    Animal welfare researchers are studying the feelings and subjective experiences of horses, octopuses and more.

    By Alla Katsnelson
  2. Particle Physics

    The W boson might be extra hefty. If so, it could hint at new physics

    A new measurement of the W boson’s mass, made by smashing particles together, reveals a potential crack in physics’ standard model.

    By Emily Conover
  3. Paleontology

    A hole in a Triceratops named Big John probably came from combat

    The nature of the wound and signs of healing suggest that the dinosaur's bony frill was impaled by a Triceratops rival.

    By Anna Gibbs
  4. Animals

    How a western banded gecko eats a scorpion

    New high-speed video details how usually mild-mannered geckos shake and incapacitate their venomous prey.