How to Make Eyebrows Grow Faster The time it can take one single eyebrow hair to go through all the stages of growth varies on several factors, but it's safe to say that the period can take well over 60 days.
Hookeâs description of these cells was published in Micrographia. The cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells. The first man to witness a live cell under a microscope was Anton van Leeuwenhoek, who in 1674 described the algae Spirogyra.
Quora User, biochemistry postdoc. I'll answer a different question of my own devising: why is the unit of life called a cell? This is down the great 17th century scientist Robert Hooke. He was the first individual to look down a microscope and see biological cells (and, in fact, draw them - below).