Japanese scientists have succeeded in creating female mouse eggs using cells from the animals' tails.
Scientists have discovered the world's oldest genetic information within 3.8 million-year-old eggshells.
Scientists have found a way for two men to reproduce without the need for any female egg at all.
An extremely rare form of cave-dwelling salamander has emerged from its egg in Slovenia's Postojna cave.
The world's largest atom smasher was immobilized this week by an inquisitive four-legged visitor.
The psychological illusionist was filmed scaring theme park staff with a four-legged demon on a leash.
The realistic four-legged robot met its match when it came face-to-face with its real-life counterpart.
A female shark at a UK sea life center has laid two eggs despite having had no contact with a male.
Two friends in Utah have recorded footage of a mysterious ice circle filled with egg-like objects.
Jane Keast and her husband Chris were shocked to find a miniature egg hidden inside a larger one.
Boston Dynamics' all-terrain four-legged robot has been joining US marines on their training exercises.
A prehistoric reptile the size of a cow may have been the first to ever stand upright on four limbs.
Scientists have unearthed the fossil remains of a strange species of snake with four tiny limbs.
Scientists have found new evidence to suggest that some dinosaur eggs were a bright blue-green color.
Several dozen fossilized eggs were discovered by builders carrying out repairs at the side of a road.
A terrified hiker managed to record several seconds of footage before legging it from the scene.
The impossible has been made possible thanks to scientists at universities in California and Australia.
Competitive eater Pan Yizhong crammed the eggs in to his mouth as part of a promotional stunt.
A woman from Essex returned from the supermarket to find a clutch of strange eggs on a bunch of bananas.
An unusual wedding ceremony has seen an 18-year-old marry her four-legged groom in front of 70 people.