Related topics: protein · species · genes · cells · brain

Ancient Siberian dogs relied on humans for seafood diets

As early as 7,400 years ago, Siberian dogs had evolved to be far smaller than wolves, making them more dependent on humans for food including sea mammals and fish trapped below the ice, a new study showed Friday.

Humans disrupting 66 million-year-old feature of ecosystems

The U-shaped relationship between diet and size in modern land mammals could also stand for "universal," says a new study, which has found that the relationship spans at least 66 million years and a range of vertebrate animal ...

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