Misc: What is the birthstone for august?

Questions

The hippopotamus has the world's shortest ----------?

The average life expectancy of a rhinoceros in captivity is ----------?

Mountain ---------- grow luxurious winter coats - more than three inches of cashmere-quality wool, overlaid with long hollow hairs. The hardy animals can endure winter temperatures as low as minus 50 degrees F, and powerful winds up to 100 miles per hour.?

The hippopotamus is, next to the elephants, the heaviest of all land mammals. It may weigh as much as 8,000 pounds. It is also a close relative of the ----------?

The average minimal speed of birds in order to remain aloft in flight is reported to be about 161/2 feet per second, or about ---------- miles per hour.?