Ageing research: Could new blood be the secret to youth?
5 May 2014 Last updated at 07:16 BST
The secret to reversing the ageing process could lie in the blood of the young, according to new research.
Scientists, who have been experimenting on mice, have discovered older animals got stronger, exercised longer and performed better mentally when they were injected with blood plasma from younger mice.
Tim Allman reports.