A new study published in the journal Nature Communications on February 24 has revealed that hippos could be related to whales. Researchers have uncovered 28 million-year-old molars belonging to a hippo, which have finally provided direct proof of their link with whales. The fossils were dug in a rock bed in Kenya and revealed that they belong to a family known as anthrocotheres.
Genetic data suggests that hippos and whales shared a common ancient ancestor about 53 million years ago. However, a huge age gap between the fossil records prevented scientists from confirming it up till now.