How The Biggest Animal On Earth Got So Big
Whales might be the largest animals on the planet, but they haven't always been so huge. Researchers say the ocean giants only became enormous fairly recently, and over a short period of time.
Whales are the largest animals on the planet, but they haven't always been giants. Fossil records show that ancient whales were much smaller than the currently living behemoths.
So when did whales get so big, and how?
A new study suggests it might be due to changes in climate that affected the food that some whales eat: krill and small fish. Instead of being spread throughout the ocean, lots of krill started
