For the brave omnivores, Croquetas de Chapulin is a must. Made from yucca and grasshopper flours, they come decorated with little shiny chapulines, which stick their long legs up in the air like practicing ballerinas.
In 2002, Iranian supreme leader Ayatollah Ali Khamenei issued a religious ruling, a fatwa, declaring embryonic stem cell research acceptable under Islamic law. (photo by Anne-Christine Pojoulat)
The UTI-causing bacteria looks a bit like a squid with long filaments, at the end of which a protein called FimH can form a tiny hook. With that hook, the bacterium hangs on to a particular molecule on the outside of human cells. (Photo by Lucy Nicholson)