Why is the Pentagon interested in UFOs?

U.S. Navy pilots and sailors won't be considered crazy for reporting unidentified flying objects, under new rules meant to encourage them to keep track of what they see. Yet just a few years ago, the Pentagon reportedly shut ...

Efficiency boost for robot submarines

Researchers in China have designed an improved energy-aware and self-adaptive deployment method for autonomous underwater vehicles. The team of Chunlai Peng and Tao Wang of the Guangdong University of Technology, in Guangzhou, ...

Do fish recognize themselves in the mirror?

A species of fish, the cleaner wrasse (Labroides dimidiatus), responds to its reflection and attempts to remove marks on its body during the mirror test—a method held as the gold standard for determining if animals are ...

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