"Each of these species and organisms work together in ecosystems, like an intricate web." Researchers issue warning after ...

From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

Satellite photos show emperor penguins in one region of Antarctica declined 22% in the past 15 years. That's significantly faster than prior estimates of their decline due to climate change.

The world is filled with wonders – both natural and manmade – that inspire a sense of awe and sheer amazement.