He is a medical genius

Christopher Wren began assisting a medical lecturer with his dissections when he was just 15 years old. Up to the Great Fire of London, he continued to practice medicine. He was also credited with being the first to administer medications through injection into the vein. Additionally, there is proof that Yale University neurosurgeon John Fulton contributed to improvements in brain surgery.

While attending Wadham College, he participated in medical research, performed the first successful injection of a chemical into the circulation, and conducted tests on terrestrial magnetism (of a dog). Wren also conducted experiments on how muscles functioned, speculating that the enlargement and contraction of muscles may result from a fermentative motion caused by the mixing of two heterogeneous fluids. Although inaccurate, at least it was based on observation, and it may herald a new perspective on medicine: specialization.