Some facts about Nikki, the Cincinnati Zoo’s pregnant Indian rhino:

Some facts about Nikki, the Cincinnati Zoo’s pregnant Indian rhino:

Age: 15. Life expectancy 40-plus years.

Why she’s unique: First Indian rhino to conceive by artificial insemination of frozen sperm.

How big: Nikki is from the second-largest of five living rhino species; they can weigh 6,000 pounds and grow to 6 feet tall at the shoulder and 12 feet long.

How many: An estimated 2,500 in the wild.

Source: AP Research