3D TV and movies seem to be all the rage but are they harmful to eyes?
What's the most ferocious aquatic creature? The answer may surprise you. "Ferocious Fish" on this Moment of Science.
Household drugs like painkillers, antibiotics and hormones enter the water system in many ways. For example, some animal feeds contain antibiotics and might flood into rivers with run-off, while other antibiotics are flushed or dumped down sinks and toilets in homes.
Killer whales communicate in a variety of dialects. There are discernible differences, however, between the chatter of killer whales that eat only fish and those that eat both fish and seals.