On the third day, the study allowed visiting hours for friends and family.

Long-term studies like this one, he said, "allow us to have some fixed point around which we can make comparisons."

These studies have allowed scientists to begin to investigate how changes to one gene can alter human communication.

The study allowed 18 women and 22 men to sleep only 26 minutes per night over a four-day period.

This study, and others like it, allows us - at least to a certain degree - a glimpse into our own future.

She lived on campus and came home only when her studies allowed it.

But previous studies have not allowed us to be precise about the deficit.

Most studies of this nature didn't allow the participants to get to know each other.

However, they added that their study did allow them to consider ways to control the trade.

His studies in physics and astronomy allowed him to support himself while a student by working for six years at a planetarium.