About 10 to 18 years in the wild, longer in captivity.
Lions and Cheetahs
They are not tusks, they are horns. Mature male horns may reach about 3-4 feet long if the horn was straight, mature ewe horns may be about 2 feet long.
the bighorn has big horns and the longhorn has long horns
in some species female chameleons grow minimal horns or no horns at all. some females horns are 12-14 inches long while males can grow up to 14 inches long
Zebra
80cm
Texas
about 1 meter.
cows with horns
The longest sheep horns ever recorded were 75 inches
the unicorns horn is 12 inches long