Officials in Qinghai Province say rising levels in Ngoring Lake (top), in the Yellow River Basin, prove that environmental efforts are working. But scientists say the effects of climate change—thawing ...

While yellow cards are sometimes necessary in order to stop a team from scoring, the repercussions of accumulating a pair at the World Cup can be detrimental for a team. If a player gets to yellow ...

Since its first documented case in the 17th century, a great mystery surrounded yellow fever. What was its cause? Theories included "fomites" — contaminated objects like clothing and bedding from ...

Clean, organize, or hide what's been bugging you and breathe a big sigh of relief.

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