Health, Science and Environment

It has been a tumultuous quarter century for San Francisco, what with the rise of its neighbor, Silicon Valley, and the changes that came with it. But at least a couple of things have stayed reliably consistent, such as the distinctive Bay Area fog that's so familiar it even has a name (just call it Karl) and the live webcam that watches it from the campus of San Francisco State University.

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More than a thousand people were gathered in a hall in Afghanistan's capital, Kabul, on Saturday night to celebrate a wedding.

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If you want to know what climate change will look like, you need to know what Earth's climate looked like in the past — what air temperatures were like, for example, and what ocean currents and sea levels were doing. You need to know what polar ice caps and glaciers were up to and, crucially, how hot the oceans were.

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Virtual reality is not new. But, as people search for alternative ways to manage pain — and reduce reliance on pills — VR is attracting renewed attention.

Imagine, for a moment you've been transported to a sunlit lagoon. And, suddenly, it's as if you're immersed in the warm water and swimming. That's what Tom Norris experiences when he straps on his VR headset.

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