Yet when they are brought together artificially, they can interbreed. Such hybrids are called tions and ligers. Do they challenge the definition of species? Not really. The key words are ...

The creation of hybrid big cats like ligers raises serious ethical questions. Experts weigh in on the potential dangers and the allure of these magnificent creatures. Dive into the debate!

A species is a group of organisms that interbreed to produce fertile offspring. Selective breeding is when organisms are deliberately bred so their offspring have the desirable characteristics.