11) What is the earliest ancestor of the horse?
12) How do horses breathe?
13) How long ago were horses domesticated?
14) What type of movement do horses have?
15) What is the longest jump over water ever made by a horse?
16) How much saliva does a horse produce compared to a human?
17) How many toes does a horse have on each foot?
18) What is the gestation period for a horse?
19) What is the most expensive horse ever sold?
20) What prevents horses from vomiting?