Scientists have grown human cells inside pig embryo.
This is just a start of growing human organs in animals to transplant into people.
In other science news..
1. Space travel may cause genetic changes -NASA
2. Insect species similar to ET discovered
3 Largest volcanic eruption occured 73,000 years ago
4. Saturn's moon Tethys looks similar to 'Death Star' in new images
5. Juno satellites captures Jupitar's little red spot
