Dolphins maintain round-the-clock visual vigilance

Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains conscious. What ...

Using smartphone cameras to track alertness

Our level of alertness rises and falls over the course of a workday, sometimes causing our energy to drop and our minds to wander just as we need to perform important tasks.

Bees coordinate strategy for defending colony, study reveals

The Brazilian stingless bee Tetragonisca angustula (jataí in Portuguese) deploys a different strategy for defending its nests from other social insect species. In addition to posting sentinels at the nest entrance, as do ...

Digital piracy casts shadow over ebook world

With electronic books growing in popularity, the publishing world focuses on fighting the threat of digital book pirates, much as the music industry once did with illegal downloading.

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