While in their eggs, turtle embryos move around to find the perfect spot that's not too hot, not too cold, but just right. And because temperature determines what sex unborn turtles become, the embryos might be able to "choose" their own sex by staying in cooler or warmer areas of the egg, according to a new study.
A site in China contains 190-million-year old organic remains from non-avian dinosaurs and dinosaur embryos, and some of the world’s oldest known eggshells, according to a new study.
It's generally a fool's errand to try putting human labels on animal behavior, but it can be possible to define how "good" animals are in terms of their capacity to act selflessly to help others. This is referred to as altruism, and it turns out plants are capable of it as well.
Embryonic chicks can be made briefly conscious during the last twenty percent of their time in the egg, if you know how to wake them up. But why would we want to do that?
A fertilized, incubated chicken egg takes about 21 days to hatch; and while most of us have seen what chicks look like at either end of the developmental spectrum (either sunny-side-up in a frying pan or newly hatched in a nature documentary), the fact that egg shells aren't see-through means that not many people have…
The technology is now in place for three different parents to contribute DNA to an embryo - two of them providing the 98% of DNA in the cell nucleus, while another provides the crucial 2% that is mitochondrial DNA.