Square Feet. The square foot is a unit of area used in the imperial and U.S. customary measurement systems. A square measurement is the two-dimensional derivative of a linear measure, so a square foot is defined as the area of a square with sides 1 ft in length.
16 Months of Patience. The white rhino is one of the largest of all rhino species, so it's not surprising that her large stature would lead to a long gestation period of 15 to 16 months. After the gestation period, the mother gives birth to a single calf weighing around 143 pounds.
I wonder if a donkey ever just up and forgot she was even pregnant since the whole process takes so long. 16. Giraffe. The average giraffe pregnancy takes 15 months. Humans can get pregnant, have a baby, and then get pregnant again in that same amount of time. Whoa. 17. Alpaca