Does spaceflight increase men's risk of erectile dysfunction?

During missions into space, astronauts are exposed to high levels of galactic cosmic radiation and weightlessness. Simulation experiments in male rats indicated that these aspects of spaceflight can negatively affect vascular ...

Study: Contraception is the future of rat control

University of Copenhagen researchers have gotten yeast cells to brew triptolide, a substance typically extracted from a rare Chinese plant. Their research makes it possible to control rats with the substance on a large scale—both ...

New study shows rats can make friends

Rats choose carefully who they spend time with, according to a new study published today. Published by researchers from the Universities of Portsmouth and Lincoln, the study found that male rats have preferred partners in ...

What causes rats without a Y chromosome to become male?

A look at the brains of an endangered spiny rat off the coast of Japan by University of Missouri (MU) Bond Life Sciences Center scientist Cheryl Rosenfeld could illuminate the subtle genetic influences that stimulate a mammal's ...

Bottom of the swimming league: Naked mole rat sperm

Naked mole rats (Heterocephalus glaber) live in a 'hive' society with one reproducing queen and between one and three reproducing males. The rest of the mole rats in the colony are workers either defending the burrow or finding ...