Ronald Kotulak

The heart has long been viewed as the seat of human spirit and emotion, a belief that poses interesting questions when a patient is given a new heart in a...

An estimated 30,000 to 50,000 Chicago residents are now believed to be infected with the virus that causes AIDS, and 10 to 30 percent of them are expected to develop...

The University of Chicago has joined Ohio State University and the University of Arizona in a project to build the world`s largest telescope, which is expected to be four times...

An estimated 40 million Americans play organized softball, and many of them are out of shape. Although no nationwide statistics are available on how many injuries occur during games, they...

Pregnant women who start labor are traditionally confined to bed. But a review of seven studies shows that women who walked around during the first phase of labor were more...

The Chernobyl nuclear plant fire in Soviet Ukraine may have something in common with the Three Mile Island nuclear accident in Pennsylvania and the Bhopal chemical leak in India. All...

Soviet officials appear to have started a mass evacuation of children from Kiev because of fears of radioactive fallout from the Chernobyl reactor 80 miles away, according to a former...

The meltdown in the Chernobyl reactor probably began with a fire in the huge graphite blocks widely used in Soviet reactors but avoided in the United States as safety hazards,...

Medical experts said Monday that the Challenger astronauts almost certainly perished within milliseconds of the tremendous explosion that destroyed the space shuttle. But the discovery of Challenger`s crew cabin and...

At least three senior NASA officials who decided to launch the space shuttle Challenger were not told that ''a number of engineers'' with the firm that made the shuttle`s booster...