This week, a group of scientists unveiled the first-ever image of a black hole at the center of the Messier 87 galaxy, some 55 million light-years away.
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Bryozoan
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University of Washington engineers present the first battery-free cellphone design that consumes only a few micro-watts of power. The new design can sense speech, actuate the earphones, and switch between uplink and downlink communications, all in real time.
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