Robert Pershing Wadlow, born February, 22, 1918, was and still remains the World's Tallest Man at 8 ft. 11 in. Wadlow weighed 439 lbs. and also holds the title for the World's Largest Hands at 12.75 in., and the World's Largest Feet at 18.5 in.
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As the world's tallest man ever, he stood 8'-11 ½” tall. He would've hit the 9-foot mark if it hadn't been for a blister on his toe. Known as the “Gentleman Giant”, Wadlow was born in Alton, Illinois on February 22, 1918, and weighed a normal nine pounds.
But the condition that caused his towering figure could kill him, doctors say. Kosen's height is caused by acromegaly, a condition that's often caused by a tumor in the pituitary gland, which causes excess growth hormones to be produced.