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.
Commissioned by motorcycle racer, Guy Martin, Rourke built and then Guy Martin rode his bike straight into the record books at an astonishing speed of 112.94 mph.The previous record for a pedal-powered bicycle was 83.13 mph, set by Dutch cyclist Sebastiaan Bowier in September 2013.The record shattering attempt took place at Pendine Sands in South Wales. Guy Martin was towed to a speed of 50 mph and then released, going on to a speed of over 112 mph on his own.ommissioned by motorcycle racer, Guy Martin, Rourke built and then Guy Martin rode his bike straight into the record books at an astonishing speed of 112.94 mph.