The soviets tried letting rats breed in zero g but they didn’t seem to manage to copulate. A number of smaller organisms have been able to breed in zero g and/or microgravity including c elegans, fruit flies, and cockroaches. They have shown that mouse IVF is at least theoretically possible (petri dish embryos are possible) but it doesn’t seem that they’ve tried actual breeding since that soviet rat experiment.
One of my favorite theories on classic “grey” aliens is that they look like that due to a native low-gravity environment: big heads and eyes, frail little bodies.
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The soviets tried letting rats breed in zero g but they didn’t seem to manage to copulate. A number of smaller organisms have been able to breed in zero g and/or microgravity including c elegans, fruit flies, and cockroaches. They have shown that mouse IVF is at least theoretically possible (petri dish embryos are possible) but it doesn’t seem that they’ve tried actual breeding since that soviet rat experiment.
One of my favorite theories on classic “grey” aliens is that they look like that due to a native low-gravity environment: big heads and eyes, frail little bodies.