The Bone Museum on Instagram: "Gigantism vs. Acromegaly: Both gigantism and acromegaly are caused by excess growth hormone, but when that hormone is released makes all the difference. In this video, we compare two real skulls, our very own Bone Museum Giant, and a real human skull replica, to show how timing shapes the skeleton. The skull affected by gigantism is noticeably longer, with an elongated face and an extended lower jaw. This happens when excess growth hormone is present before growth