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Perplexity Comet

The Web Should Work For You We believe curiosity is a superpower. It’s the spark that propels humanity forward. Yet, the web—our greatest source of information—was never designed to nurture curiosity; instead we’ve been asked to “browse” it through a one-way lens. That’s why we made Comet. Comet gives curious minds a thought partner for every aspect of online life. Comet moves every tab or task into a simple space for asking more of the world. With Comet, the web becomes a tool of curiosity, h

Curiosity Mars rover discovers evidence of ripples from ancient Red Planet lake

Today, we know of Mars as a cold, dry desert, with patches of subterranean ice and ice caps at its poles. Billions of years ago, however, liquid water flowed freely across the planet. And, while NASA's various Mars rovers have uncovered signs that such water once existed on Mars , there's perhaps no better evidence of an ice-free, shallow lake than these two sets of ripples in Martian rock. In November 2022, NASA's Curiosity rover imaged the Amapari Marker Band in the foothills of Mount Sharp,