Scientists / in other laboratories / around the world / are doing similar research.
So far, / the results suggest / the same thing.
If you restrict the / number of calories / that an animal eats, / it will live longer / than an animal that eats a lot.
In one study / , mice ate 30 per cent fewer calories than normal. /
These mice / lived 40 percent longer / than the mice / that had a normal diet.
They also had / fewer age-related problems / and diseases.