Nearly five million people are bitten by dogs each year in the United States, and children are at a much higher risk than adults. Dog bites can cause significant psychological and physical damage, and bites to the face often require reconstructive surgery to repair injuries ranging from nerve damage to tissue loss. While certain breeds are known to bite more frequently or cause more severe injuries, a new study finds the breed was unknown in about 60 percent of dog bite cases.
Using zebrafish larvae, biologists have discovered neural mechanisms that suppress slow muscle activity in fish swimming at high speeds.
A new study finds that the low-cost, extreme draining of a reservoir in Oregon aided downstream migration of juvenile chinook salmon -- and led to the gradual disappearance of two species of predatory invasive fish in the artificial lake.