The ancient camel question is: One hump or two? Arabian camels, also known as dromedaries, have only one hump, but they employ it to great effect. The hump stores up to 80 pounds of fat ...

people continued to think camel humps must hold water. For at least 4,000 years, two species, the dromedary and Bactrian, have been humankind’s beast of burden in Arabia and Central Asia ...

How many humps? Never get a Bactrian mixed up with a Dromedary again. If you think you've got a poor memory, you're wrong. Your brain can soak up new information easily... if you keep it interested.