Her groundbreaking theory on the origin of life was rejected 15 times. Then biology proved her right.
Lynn Margulis had the audacity to challenge Darwin. And we're lucky she did.
A photo of Lynn Margulis.
Throughout her prolific and distinguished career, biologist Lynn Margulis made several groundbreaking contributions to science that we take for granted as common knowledge today. For example, she championed James E. Lovelock’s “Gaia concept,” which posited that the Earth self-regulates to maintain conditions for life.
But by far, her most notable theory was symbiogenesis. While it was first written off as “strange” and “aesthetically pleasing” but “not compelling,” it would ultimately prevail, and completely rewrite how we viewed the origin of life itself.
In the late 1960s, Margulis wrote a paper titled "On the Origin of Mitosing Cells," that was quite avant-garde. In it, she proposed a theory: that life evolved through organisms merging together to become inseparable.
In essence, cooperation is the driver of life, not competition and domination. This directly went against Darwin’s “survival of the fittest” principle that was considered gospel in scientific circles. Margulis’ paper was rejected by fifteen journals before getting accepted into the Journal of Theoretical Biology.
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Time would be on Margulis’ side, however. By the late ‘70s and early ‘80s, research proved that the two major building blocks of plants and animals, chloroplasts and mitochondria were at one time independent bacteria. This solidified the fact that on a biological level, connection trumps autonomy for longevity. And now that fact is written in textbooks, with no real story of the adversity it overcame to get there.
While it is customary for most new scientific theories to be met with criticism, especially those that completely shift the current narrative, many have noted that sexism played a key part in Margulis’ initial lack of acceptance. On more than one occasion, she herself had hinted that women were seen as mothers and wives first, and scientists second. She recalled that while married to fellow scientist Carl Sagan that “Carl would finish his sentence, unperturbed” while she was expected to “handle all the duties of a 1950s housewife, from washing dishes to paying the household bills.”
And yet, Margulis would have other ideas that were controversial that had nothing to do with her gender. Most famously, she did not believe that AIDS was caused by HIV, and instead believed it was cause by a syphilis-causing type of bacteria, despite there already being decades of research proving otherwise. That view was seen as an endorsement of AIDS denialism, which undermined prevention and treatment effort. Then later in life, Margulis became a vocal proponent of 9/11 conspiracy theories suggesting government involvement the in Twin Towers attacks.
And yet, perhaps this is one of those “you gotta take the good with the bad” situations. Margulis’ inherent contrarian nature gave us both these unfounded, even harmful stances, in addition to entirely new paradigms that altered our understanding of life itself.
And if nothing else, it illuminated the need for science to include multiple points of view in order to unlock the truth. It seems life is, after all, about coming together.



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Men try to read the most disturbing comments women get online back to them.
If you wouldn't say it to their faces, don't type it.
This isn’t comfortable to talk about.
Trigger warning for discussion of sexual assault and violence.
in 2016, a video by Just Not Sports took two prominent female sportswriters and had regular guys* read the awful abuse they receive online aloud.
Sportswriters Sarah Spain and Julie DiCaro sat by as men read some of the most vile tweets they receive on a daily basis. See how long you can last watching it.
*(Note: The men reading them did not write these comments; they're just being helpful volunteers to prove a point.)
It starts out kind of jokey but eventually devolves into messages like this:
Awful.
All images and GIFs from Just Not Sports/YouTube.
These types of messages come in response to one thing: The women were doing their jobs.
Those wishes that DiCaro would die by hockey stick and get raped? Those were the result of her simply reporting on the National Hockey League's most disturbing ordeal: the Patrick Kane rape case, in which one of the league's top players was accused of rape.
DiCaro wasn't writing opinion pieces. She was simply reporting things like what the police said, statements from lawyers, and just general everyday work reporters do. In response, she received a deluge of death threats. Her male colleagues didn't receive nearly the same amount of abuse.
It got to the point where she and her employer thought it best for her to stay home for a day or two for her own physical safety.
The men in the video seemed absolutely shocked that real live human beings would attack someone simply for doing their job.
Not saying it.
All images and GIFs from Just Not Sports/YouTube.
Most found themselves speechless or, at very least, struggling to read the words being presented.
It evoked shame and sympathy.
All images and GIFs from Just Not Sports/YouTube.
Think this is all just anecdotal? There's evidence to the contrary.
The Guardian did a study to find out how bad this problem really is. They combed through more than 70 million comments that have been posted on their site since 2006 and counted the number of comments that violated their comment policy and were blocked.
The stats were staggering.
From their comprehensive and disturbing article:
If you can’t say it to their face... don’t type it.
All images and GIFs from Just Not Sports/YouTube.
So, what can people do about this kind of harassment once they know it exists?
There are no easy answers. But the more people who know this behavior exists, the more people there will be to tell others it's not OK to talk to anyone like that.
Watch the whole video below:
This article originally appeared nine years ago.