Cetaceans, the infraorder of aquatic mammals consisting of whales, dolphins, and porpoises, are some of the most unique animals on earth, but they are also some of the most endangered. Cetaceans ...

What are the tallest trees in the world? These 10 skyscraping superstars are some of the stalwart examples of their species.

Endangered turtles need our help. Learn about some of the incredible turtle species facing a serious risk of extinction.

Natural stone towers around the world inspire awe and wonder. From Uluru to El Capitan, here are 10 of the largest monoliths in the world.

Even after nurturing and enchanting humans for thousands of years, the Nile River is full of surprises—and the longest river in the world.

Want to know what's ailing nearby trees? This index of common tree diseases and pathogens can help you identify and prevent further decay.

10 of the Largest Insects in the World These insects are big enough to give even seasoned entomologists a good fright.

If you'd like to donate to a reputable wildlife conservation organization, here's a list of the 10 best from Oceana to World Wildlife Fund and more.

The list of endangered bird species is disturbingly long. Among some of the most endangered are these amazing, unique, and beautiful birds.

Do dogs like to be petted? Generally yes, but not on the face. Here are other things dogs hate—including some you may be doing them without realizing.

Creatures with transparent, glass-like skin can be found lurking in abundance in ecosystems around the globe. Here's our list of 11.

The ugliest animals on the planet might not win beauty pageants, but their unattractive traits allow them to survive in harsh environments.