Jan Swammerdam was born #Onthisday February 12th, 1637 A.D. and died on February 17th 1680 A.D. he was a Dutch microscopy and biologist. Jan worked on insects which showed the different phases of the life from the insect egg, larva, pupa and to an adult which he believed were different forms of the same animal.

As part of his research he carried out various experiments on muscle contraction in 1657 A.D. he was the first to describe and obverse Red blood cells.

He was even one of the first people to use the microscope in discussion but his style of work remained useful for many centuries later…