The orca, or killer whale (Orcinus orca), is a curious combination of fearsome predator and charismatic marine mammal. These large, black-and-white members of the dolphin family live in all the ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Leaves are the food factories of the tree. Powered by sunlight, the green ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Cottonwoods are poplars native to North America, Europe, and western Asia.

Doris Lin is an animal rights attorney and the Director of Legal and Government Affairs for the Animal Protection League of New Jersey. Her focuses as an expert writer include animal rights and ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Leaf shapes play an important role in tree identification, providing key ...