Researchers from the Queensland University of Technology's (QUT) have discovered two new species of marsupials whose sexual practices often kill them off. One is already threatened with extinction thanks to habitat loss, feral pests, and climate change.
Females of a critically endangered sawfish species have taken a drastic step toward survival: parthenogenesis, or asexual reproduction. This is the first time that a vertebrate that typically reproduces sexually has been observed engaging in parthenogenesis.
Four years ago, when a powerful magnitude 9.0 earthquake struck off the coast of Japan, it triggered a wall of water that devastated much of Japan's northern coast. But the environmental ripples are still being felt, as debris continues to wash ashore in Washington State, bringing with it many unwelcome visitors.
Up to 25 percent of all the world's sharks and rays may be wiped out in only a few years, according to a global study.
