No salt, no butter, air popped popcorn is one of the most nutritious foods you can eat.
It was one of the Earth's momentous times. Continents collided. Volcanoes erupted. Ocean currents shifted. Species ran amok.
Can there be such a thing as natural, fake flowers?
A male sand goby is less likely to eat the eggs containing his future offspring if a female goby is around.
Geysers spout up where a column of underground water is heated to boiling by "magma," or molten rock, pushing the water upward.
Raw onions contain sulfur compounds that are toxic to pets.
Ultrasound uses high frequency sound waves to create pictures of what is going on in our body.
Plants do several defensive things when confronted by insects and animals.
Learn why you sometimes have glowing red eyes in photographs.