I honestly have no idea why scientists aren’t all developmental biologists.

This is what happens when a fly has a mutation that causes legs to grow where its antenna should be.
This is what happens when you cut pigmented and albino frog embryos in half across the midsection, then swap the head/tail ends.
This is what happens when you take the ‘make head/backbone’ cells from one frog embryo and stick them in another.
And this is what happens when you trick a frog embryo into believing a ‘make head’ signal halfway down its body.
This is what happens when a mouse paw can’t process which side is which.
This is what happens when you treat frog embryos with UV light (left; all tummy) or lithium chloride (right; all head).
This is what happens when you chop a limb off a salamander.
This is what happens when you trick a chick into growing for an extra wing.

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More from @FondOfBeetles

25 Aug
I don’t understand why face-swapping people is some kind of ‘transphobe gotcha’?

Anyway, here’s Matt Berry.
It apparently doesn’t work in reverse.
Read 4 tweets
24 Aug
In 2015, the British Psychology Society submitted evidence to Maria Miller’s Transgender Equality Enquiry that male sex offenders have been known to falsely claim trans status as ‘female’.
Reasons for exploitation of GRA laws by predatory males included:
1. demonstrating reduced risk > parole
2. explaining their sex offending
3. separating from their sex offending self
4. better access to females and young children through presenting in an apparently female way.
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22 Aug
‘There are many factors that may contribute to competition success in tennis – height, weight, reach, power, speed, nutrition, good coaching, other environmental factors, etc. – but they cannot be balanced against the categorial factor of sex.’

tandfonline.com/doi/full/10.10…
‘Here, sex […] provides the foundation and context within which competition advantages may be expressed.’
This paper is very nicely written. The authors dissect terms like:

‘discrimination’ - logically, to distinguish; socially, to dis/favour.

‘arbitrary’ - the existence of a rule may not be arbitrary (weight cats), while the threshold may be so (60 v 65kg cat).
Read 6 tweets
14 Aug
In 1977, we sent two records into interstellar space. The records contain the story of humans, such that any intercepting alien race can begin to understand us.

voyager.jpl.nasa.gov/galleries/imag…
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The records will show aliens how we live and how we reproduce.
Read 7 tweets
2 Aug
And the +87kg Olympic weightlifting competition is just starting.

Come on, Emily!
Li Wenwen not even bothering to warm up 😂
Hubbard starting with 115kg snatch (current best 133kg). Li Wenwen in at 135kg.
Read 47 tweets
2 Aug
I had a quick appearance on @bbc5live with Joanna Harper this morning. From 8:20 here:

bbc.co.uk/sounds/play/li…
I wasn’t given time to challenge Harper’s final words, so I will do so here. @markchapman @rachelburden

Harper: Hubbard doesn’t have an ‘overwhelming advantage’, therefore her inclusion is fair.

(Not verbatim)
Hubbard does have an overwhelming advantage.

Using her performances as junior male and Masters/senior female, and accounting for a small loss of strength in transition, estimates from my academic colleagues who study elite weightlifting put her male advantage at 25-50%.
Read 12 tweets

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