Photo issued by Greenpeace of Chinstrap Penguins on Elephant Island, Antarctica. Photograph: Christian Aslund/Greenpeace/PA Wire

Numbers of chinstrap penguins have fallen by almost three fifths in half a century in an important Antarctic habitat for the birds, scientists said. (...)

The World Health Organisation endorses the use of traditional herbal remedies. Photograph: iStockphoto

Of all complementary therapies, the one least likely to raise my hackles is herbal medicine. Partly because many modern medicines have originated from(...)

Biological samples used to determine the efficacy of chemotherapy drugs. Photograph: Dan Kitwood/Getty

Most cases of cancer result from avoidable factors such as toxic chemicals and radiation, according to a new study. The findings clash with research (...)