Neuroscience

Anesthesia study unlocks clues about the nature of consciousness

For decades, one of the most fundamental and vexing questions in neuroscience has been: What is the physical basis of consciousness in the brain? Most researchers favor classical models, based on classical physics, while ...

Addiction

An implantable sensor could reverse opioid overdoses

In 2023, more than 100,000 Americans died from opioid overdoses. The most effective way to save someone who has overdosed is to administer a drug called naloxone, but a first responder or bystander can't always reach the ...

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Animal

Animals are a major group of mostly multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently. Most animals are also heterotrophs, meaning they must ingest other organisms for sustenance.

Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago.

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