mammalian

Each human and mammalian infection gives the virus an opportunity to mutate and evolve better ways of transmitting from person to person — a key benchmark for what makes a pathogen a pandemic-level threat.

Instead, they reveal mammalian brains to be the product of millions of years of evolution and adaptation to environments.

Experts have continued to raise ethical and ecological issues with “de-extinction,” even as science has advanced to the point where manipulating mammalian genomes is technically possible.

Cats, rats and rabbits are believed to be coyotes’ preferred mammalian prey, she said.

The terror birds, which out-competed the mammals in occupying this particular ecological niche, may even have driven mammalian predators to take to the forests instead.