�y��vlog

But Ben and his little brother were doted upon by all their adopted grannies and grandpas.

“We thought, ‘This is a game of diminishing returns and we will be playing grannies.’

The treated mice were known as "supermodel grannies" in the lab because of their youthful appearance.

These glamorous grannies are modelling for social media.

These days no one would suggest that Julia Louis-Dreyfus, who is 62, could only play grannies any more than they would say that Tom Cruise, 61, should stop parachuting off cliffs.