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Planetary Science

Water may have killed Mars’ magnetic field

Extra hydrogen near the Red Planet’s iron core could have shut down convection.

Neuroscience

When tickling the brain to stimulate memory, location matters

Conflicting results regarding the benefits of brain stimulation may be explained by the precise location of electrodes.

Anthropology

Modern chimp brains share similarities with ancient hominids

MRIs suggest certain brain folding patterns don’t mark ancient humanlike neural advances after all, raising questions about hominid brain evolution.

Animals

Humpback whale bumps have marine biologists stumped

Christine Gabriele is taking tissue samples from humpback whales in Hawaii to determine why more and more have nodular dermatitis.