Dallas C. Robson

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What is virga?

We’ve all seen virga, but maybe not known what it’s called. Virga is rain that evaporates before it hits the ground. Enjoy these photos!<p>Virga often …

Mars probe to get rare view of comet

Astronomers will have a virtual front-row seat to study a pristine comet in October, when it squeaks past Mars and a flotilla of spacecraft orbiting …

Company says it's created the world's blackest black with carbon nanotubes

Black may not be, it turns out, the darkest shade — at least not black as we know it. British tech company Surrey Nanosystems says it's developed the world's blackest material: made of carbon nanotubes, it can absorb 99.96 percent of light that hits it. Its developers say that to the human eye, the …