A representation of the 3D structure of the Hepatitis delta virus ribozyme. [1] The HDV ribozyme is structurally and biochemically related to many other self-cleaving ribozymes. These other ribozymes ...

A new species of hammerhead shark has been discovered, and its namesake is the late Paul G. Allen, the co-founder of Microsoft and a well-known champion for marine conservation who played a ...

THIS is the heart-dropping moment a kayaker has to use his paddle as a weapon to ward off a hammerhead shark. The local decided to act after seeing the beast circling him while he enjoyed a day ...

A kayaker in the Canary Islands used his paddle to fight off a hammerhead shark that persistently approached him. Juan José Afonso, from the island of La Palma, was fishing when the predator ...