Feature

Use of Waterpower Called Drop in Bucket

Earn Lasker Awards

“Brain” Watches Flow of Niagara Falls

Now Find First American Lived 30,000 Years Ago

To Help Drowning Tots

Two-Way Heart Surgery

Can Transplant Teeth in Selected Patients

Damaged Hearts Have Strength for Come-Back

In Science Fields

In Search of the Sun

Experts Fret as Virus Loses Power to Kill

Books of the Week