Killer whales, or orcas, are the largest members of the oceanic dolphin family. The intelligent mammals, which hunt in large pods, are known for their coordinated attacks on uns...

Carbon dioxide (CO2), released from burning fossil fuels like oil and coal, is a big contributor to global warming and climate change. Over the years, scientists have come up wi...

We thought that Wisconsin resident John Peterson had gone overboard when he spent three years building his kids a 200 square foot treehouse. However, Mr. Peterson's treehouse pa...