The long, spiral tusks of narwhals could be used by these Arctic whales to stun or even kill prey, according to wildlife ...

Some of the narwhals with tusks seemed to use them in a playful way to explore and manipulate fish such as Arctic char, he says ... behavior and being able to record it," says Laidre.

The solar system would also have encountered high levels of dust that may have penetrated the atmosphere, leaving traces of radioactive elements from supernovae in the geological record ...

Thirteen consecutive winters without complete mixing marks a "historic record", warned Gallina ... which themselves serve as the food base for fish. The future of Arctic char, fera and other ...