Denim dresses, cool co-ords and light layers - these are all the pieces I've been eyeing up as a fashion writer ...

Q: What makes ivory so precious? —C.B. | Redwood City, California It has no intrinsic value, but its cultural uses make ivory highly prized. In Africa, it has been a status symbol for millennia ...

Why do humans have canine teeth? Patrick McGannon, Surprise, Arizona All primate species have them, says Sabrina Sholts, a curator of physical anthropology at the Museum of Natural History.