Worldwide, too little iodine in the diet is the most common cause of hypothyroidism. In countries with enough iodine in the diet, the most common cause of hypothyroidism is the autoimmune condition Hashimoto's thyroiditis.
The pronghorn is the second fastest land mammal in the world, after the cheetah. It can attain speeds of over 53 miles (86 kilometers) per hour. Size relative to a 6-ft (2-m) man: Fleet-footed pronghorns are among the speediest animals in North America. They can run at more than 53 miles (86 kilometers) an hour, leaving pursuing coyotes and bobcats in the dust.
Speed = (460 X front sprocket) / (rear sprocket). Stock bikes are generally geared to reach their top speeds at just below their power peaks in top gear (12,000 rpm for our CBR's top speed of 157 mph, with power peaking at 12,500 rpm) so as to maximize speed and allow for things such as going downhill and wind.