Heather E Heying Profile picture
Jun 24, 2020 5 tweets 2 min read Read on X
“Men menstruate. Some have even given birth.” If you disagree, you are “attacking trans lives,” and likely one of those deplorables who support Trump.

I’m no Trump supporter, just a biologist who knows that this “new trans reality” is a dangerous fiction.
nytimes.com/2020/06/23/opi…
“The only difference between a trans woman and a cisgender woman is the sex assigned to her at birth.”

No. Really not.

Most people know this is flat out wrong.

Most people who hear this nod abjectly, eyes averted, hoping this will pass by and leave them intact.
Again, no.

The vast majority of us who call bullshit on reality-denial are not “anti-trans.”

Nature is not anarchic re: sex. We have 2 types of gametes, by which we sexually reproduce. Small and mobile -> sperm -> male. Large and sessile -> egg -> female. Where’s the anarchy? Image
Here are @BretWeinstein and I discussing sex and gender on our livestream Q&A today:
And here am I talking about sex and gender at the Krishnamurti Foundation in 2018:

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More from @HeatherEHeying

Jun 3
Being assigned male or female at birth does not make you that thing.

Sex exists outside of human understanding of it. And sometimes, rarely, we are wrong. 🧵

telegraph.co.uk/boxing/2025/05…
You are already, from the moment of conception, male or female. Normal development produces a baby that is easily recognizable as one sex or the other.
Development is not always normal, however, and then, sometimes, we get it wrong.

Such was the case with Imane Khelif. Khelif is the Algerian boxer who beat women to take home gold in the Paris Olympics, despite the fact that he is a man.
Read 8 tweets
Feb 9, 2023
.@thedarkhorsepod declared a spreader of misinformation.

Nope. We engage topics scientifically, are skeptical in the face of certainty, & speak truth even when it’s inconvenient for those in power.

The @nytimes of old would have applauded such behavior.
nytimes.com/2023/02/09/tec…
@thedarkhorsepod @nytimes A reminder: fact-checkers aren’t scientists, and many of the “facts” claimed to be false by these petty tyrants have long since checked out as true.
open.substack.com/pub/naturalsel…
#FollowTheScience is a perfect encapsulation of an anti-scientific approach to the world, shared by those who think they are modern and hip and sciencey.

Instead of following the herd, go off on your own, and try working some of it out for yourself.
open.substack.com/pub/naturalsel…
Read 4 tweets
Dec 20, 2022
“Do you know that Newspeak is the only language in the world whose vocabulary gets smaller every year?” Syme asks Winston in 1984. “Don’t you see that the whole aim of Newspeak is to narrow the range of thought?”
open.substack.com/pub/naturalsel…
As I noted in the last footnote of the linked piece, the Wall Street Journal ran an op-ed that I saw after I had finished it, which includes a link to the now forbidden content. Here are a few gems:
Using more words is always more awesomer than using fewer words. What about albino people of African descent though? Where do they fit in to the acronym? Come on, guys, do better. Be better.
Read 11 tweets
Nov 21, 2022
Breaking news! Vitamin D protective against Covid!

Some of us have been saying this for a long time, but media & public health orgs have been silent. It's like they prioritize our fear and compliance over our ability to take control of our own health.
nature.com/articles/s4159…
Here’s my Substack, from October 26, 2021
Here’s Bret and me on DarkHorse talking about it, in a clip from #DarkHorseLive102, which aired on October 30, 2021:
Read 4 tweets
Oct 31, 2022
“The people who got it right, for whatever reason, may want to gloat.”

Being recognized for having gotten it right is not gloating, @ProfEmilyOster.

And those who got it so terribly wrong? You need to apologize, and work hard to right what you and yours inflicted on people.
Vaccine mandates caused job and income loss, family break-ups, injury, death.

These are mandates for vaccines, remember, that people *now* claim were never supposed to stop transmission.

You advocated for mandates, and now you would have us move on? How dare you.
There are many who are permanently harmed—physically, financially, socially—by what you and yours wrought on society, with your uninvestigated terror and rules.

This is the failure of “data-driven” in stark relief. Next time, try a hypothesis. Do actual science.
Read 4 tweets

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