Orcas evolved from a small deer-like species that roamed the earth more than 50 million years ago. They are among the most formidable animals in the ocean — pack-hunting creatures that feed on ...

Deer mice construct spherical or cup-shaped nests of shredded plant fibers, fur, and feathers under logs, stumps, rocks in the abandoned dens of other mammals, but prefers natural cavities of tress.