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Excellent rant
(lemmy.nz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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That sounds like parthenogenesis to me.
The stingray ended up being sick and not actually pregnant. They were possibly seeing cysts, not eggs. Or possibly cysts and eggs and the illness caused the embryos to abort and were eaten before anyone noticed them.
https://www.smithsonianmag.com/smart-news/pregnant-virgin-stingray-wont-give-birth-after-all-heres-why-180984458/
And a surprisingly large number of species can do it.
I wish women could do...
As the one of those from the half of the species that you are wanting to wipe out I have to say, "I get it... we brought this on ourselves."