Head shaking, ears flapping, collar jangling — you probably see your dog doing this at least once a day. But is there any reason for this behavior? Or should you be concerned? Why do dogs ...

The single-celled parasite Entamoeba histolytica infects 50 million people each year, killing nearly 70,000. Usually, this ...

Half a century after the world's first deep sea mining tests picked nodules from the seafloor off the US east coast, the damage has barely begun to heal. As wind farms expand, some can ...