Sharks may be fierce predators, but they're also among the most misunderstood animals, often portrayed as mindless killers.

"De-extinction" takes center stage as environmentalists express dismay over erosion of the Endangered Species Act ...

In California all new homes must have state-of-the-art insulation, high efficiency windows and super-duper mechanical systems ...

Not all plants can be stored in a seed bank. Cryopreservation offers an alternative, but critics question whether this form of conservation will work.