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 ...

His own definition is basically incomprehensible, but that doesn't matter because he immediately starts in on "Tions" and "Ligers." Which really do exist, as a subspecies. You should care about ...

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!