25. A big animal
Bison bulls may weigh a
ton, cows top out around
1,100 pounds and calves
weigh about 65 pounds
when born.
Bison can run at 35 MPH
for long distances.
Bison can live up to 40
years in captivity.
39. Formerly, their only
natural enemies were
wolves and grizzly
bears.
Bison will use their
massive heads to
push the snow aside
in winter to reach the
grass beneath.