Liger, a hybrid cross between a male lion and a tigress. They occur only on captivity, due to the fact that their natural habitats simply do not overlap. The Liger is easily the largest of all animals found in the family felidae(cats)
The Liger is a hybrid cross between a male lion and a female tiger, thus both its parents are from the Panthera genus, but from different species. Ligers are the biggest of all the big cats, growing to almost the lion and tigers combined size.
Looking through the physics book I came across the black hole. If you went through a black hole your body would be stretched, flattened, and eventually pulled apart. This is on page This has to deal with Chapter 7 Gravitation.