The incredibly rare specimen was found collecting dust in the back room of a museum in China.
The remarkable achievement involved creating synthetic human embryos from stem cells in the laboratory.
Embryo-like structures with a brain, intestines and a beating heart have been created by scientists in a lab.
An unhatched dinosaur resembling a 17-day-old chicken embryo has been discovered by palaeontologists.
The controversial research, while impressive, has unsurprisingly raised some major ethical concerns.
Physicists now believe that a large planetary embryo collided with the gas giant in the distant past.
A team of Spanish scientists working in China have injected human stem cells into the embryo of a monkey.
A bizarre new theory proposes that octopus embryos arrived on Earth on a comet millions of years ago.
The research aims to solve donor organ shortages by making it possible to grow human organs inside sheep.
The record-breaking achievement is thought to represent the longest ever gap between conception and birth.
For the first time ever, a method known as 'chemical surgery' has been used to fix a faulty human gene.
In a world first, researchers have managed to create artificial embryos using the stem cells of mice.
Scientists believe that an elephant-mammoth hybrid embryo could be created within as little as two years.
26-year-old Yamini Karanam had been undergoing neural surgery when her unborn twin was discovered.
The ability to turn skin cells in to embryonic stem cells is being hailed as a major breakthrough.
Palaeontologists have unearthed the oldest known fossilized dinosaur embryos ever discovered.
A unique species of extinct frog that gives birth through its mouth may soon be rising from the dead.
Pope Benedict XVI has made a statement during a vespers service requesting respect for embryos.
The world's oldest known dinosaur embryos have been identified at 190 million years old.
A baby has been born from an embryo frozen 20 years ago scientists have announced.