Fatherless mice!
Mice 'conceived' from the egg cells of two female parents, with no input from a male sperm cell, have grown into normal, healthy adults, and had pups of their own.

The scientists, from the Tokyo University of Agriculture, first caused one of the female mice eggs to 'metamorphosise into a surrogate sperm'.

Humans must have sex is because our DNA - our genetic code - behaves differently depending on whether it comes from mum or dad.
And without both a female and a male copy, our whole development gets thrown out of whack.

It's called genomic imprinting, with parts of the DNA in sperm and parts of the DNA in eggs, getting different "stamps" that alter how they work.

Errors in genomic imprinting have been implicated in some diseases such as Angelman syndrome.

The bits of DNA carrying these stamps were the ones the researchers had to delete in order to make the baby mice viable.

[bbc.com]