An extinct marsupial hunter only the size of a fox may have hunted prey larger than itself.
When kenneled, a large percentage of dogs show behaviors
commonly associated with mental illness. Some even bounce off the walls
-- literally.
The trees koalas prefer to sit in doesn't necessarily correspond to where they prefer eating.
Damp canoes and fishing gear provide a route for invasive species to spread.
Most reptile and bird species will lose chunks of their
homelands by 2099. Only a few will stay the same or gain.
An extinct arthropod, Fuxianhuia protensa, from the Cambrian
period, had a sophisticated heart and blood vessel system.
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