The program was designed to allow low-cost and quick reactive experiments to be placed on board the Space Shuttle.

This allows experiments designed to test the effect of such conditions on lifespan and physical size.

Pro-lifers will claim that if we allow experiments up to 14 days, then next year it will be a month, then three months.

Macaques are less expensive and more common, allowing experiments in more animals.

This is the experimental space, with lower vibrations than the surrounding floor and allowing experiments to continue while the researcher walks around within the lab.

This also allows other questions to be asked and new experiments to be thought of.

In the '80s, she was persuaded by Professor Hudgens to allow experiments on the orphans.

In Russian, he added: "You know well that we do not allow uncontrolled experiments."

By the early 1980s, the computational speed of computers, along with refinements in climate models, allowed longer experiments.

The 2008 Act also allows experiments on hybrid human-animal embryos.