The Zoo has been following the work of the Zoological Society of London and this evening it looks at the ground-breaking work being done at the Bedfordshire attraction involving chimps and heart surgeons.
Click above to watch ITV News Anglia's Olivia Paterson report
More top news
Freezing fog patches again overnight and tomorrow morning.
The Duchess of Cambridge has met some inspirational families on her visit to the Quidenham hospice in Norfolk
A man who tied up a mother and interrogated her young children until they handed over cash and jewellery has been jailed.