The evolution of whales from land-based animals to the ocean's largest mammals is on display in the stunning Wadi Al-Hitan desert of Egypt.

Earth Day's inception in 1970 set off a chain of environmental achievements over the past four decades including laws that limit pollution and protect wildlife.

Trail Marker Trees are living cultural signposts, shaped and molded by ancient Native Americans to be navigational aids in a time before GPS, compasses or maps.

Tired of waking up tired? Your weary query is wasted on these 12 sleepy creatures who appear to be wide open to the prospect of a good night's rest.

The earliest ancestor of all vertebrates (including us) appears to have been Pikaia Gracilens, a tiny, worm-like creature just 2 inches long.

Deadly or delicious, beautiful or bland, these 10 strange & beautiful mushrooms span the imagination while spanning the globe when it comes to location.

Valentine's Day is all about love, loving and feeding our (ahem) amorous appetites. Eat to win and the sweet thrill of victory can be yours to share!

Looking for a sweet treat that's hard to beat? The 10 jumbo fruits featured here aren't just meals in themselves, they're literally outstanding in their fields.

Jerky makes a high-protein, low calorie snack and it can be made from almost any kind of meat... including these ten rather surprising ones.

2012 is the Year of the Dragon according to the Chinese zodiac and the dragon is the only one of the 12 animals to be wholly mythical... or is it?

Thundersnow: Marvel superhero or heavy metal band? Neither, actually, though the name of this rare aspect of winter weather sounds as awesome as it is.

An abundance of animals bear the burden of doubly descriptive names. An identity crisis in the making? The animals aren't saying so it's up to us to decide.

Nuts about nuts? This selection of 10 unusual nuts highlights the sweet yet occasionally distasteful relationship we have with these swell shelled feed seeds.

Bacteria is essential to human health and that of the earth, but did you know it can also clean up radiation & pollution, target tumors and turn waste into fuel?

From fascinating phenomena and optical effects like earthshine and eclipses to phases, movement & texture, these images show off the moon in all its beauty.