Many animals use their limbs to handle their food and obtain edible pieces from it. To take a relatable example, we humans peel fruits, fillet fish, and break crabs with our hands and tools. In contrast, most animals that lack limbs (like snakes) would be... click to read more

Why is there variation in the number of species between different groups of animals and plants? Why do some groups seem to be more "evolutionarily successful" with a higher number of species than other? For instance, there are over 10,000 species of birds but just... click to read more

Legends say that the rhinoceros has skin that can withstand a gunshot. Despite the slight exaggeration, without a doubt the rhinoceros bears one of the toughest hides in the animal kingdom, stretching as thick as 5 cm and woven together specifically to repel attacks. What... click to read more