Lynn Margulis is one of my personal heroes. When she firs…

Lynn Margulis is one of my personal heroes.

When she first proposed the endosymbiotic theory in the 1960s, most scientists rejected it. Many of her papers were turned down by journals. But over time, strong evidence backed her up: mitochondria and chloroplasts have their own DNA, and that DNA is very similar to bacterial DNA. These facts made her ideas impossible to ignore.


Today, her work is a cornerstone of biology. Almost every biology textbook includes her theory as a major part of how complex life evolved. She’s ranked with people like Darwin and Watson & Crick. Not because she won a popularity contest, but because her ideas reshaped our understanding of life itself.

Among biologists, Margulis is respected for three main reasons:


+ She explained a major step in evolution that no one else had fully figured out.
+ She showed that cooperation, not just competition, drives evolution.
+ She stuck to her ideas even when the scientific establishment pushed back hard. 💪🏼


Among the general science-following public, she’s also known as a bold thinker. I love this about her .. someone who wasn’t afraid to challenge the rules. And a woman in THAT community? Even more impressive.

Today both the scientific community and a lot of the science-interested public see Lynn Margulis as a giant in biology.