The congenital condition spina bifida is often treated surgically in the womb, but many children still go on to have mobility issues. The addition of a patch made up of stem cells from donated placent ...

本集内容. The 'weird' planetary system baffling scientists. 令科学家困惑的 “诡异” 行星系统. 文字稿. This is star LHS 1903 – and the weird ...