For decades, rumors of alien spacecraft at Area 51 have captivated the public imagination. In what is now known as one of the most infamous government cover-ups, an absence of information fueled wild ...

Forty-five years after a jury convicted Dr. Sam Sheppard of bludgeoning his wife to death in his home, the Ohio courts will once again hear testimony in a Sheppard trial. In January 2000, Sam Reese ...

How big is the universe? If it began with the Big Bang, will it also have an end? Is there life beyond our planet? Questions like these inspired the launch of Voyager I in 1977 and have driven ...

The question of who built the pyramids, and how, has long been debated by Egyptologists and historians. Standing at the base of the pyramids at Giza it is hard to believe that any of these enormous ...

Anyone who has seen a fireworks display has probably wondered, "How'd they do that?" Well it's actually quite elemental—The Periodic Table of the Elements, that is. The whiz, bang, pop, and color are ...

The search for the cause of the fire that brought down Swissair Flight 111 on the evening of September 2, 1998, killing all 229 people aboard, took over four years and cost $39 million. It was one of ...

Three women at risk of developing Alzheimer’s join a groundbreaking study to try to prevent the disease, while sharing their ups and downs, anxiously watching for symptoms, and hoping they can make a ...

A few years back, NOVA Online asked both doctors and non-doctors to comment on the relevance of the Hippocratic Oath, which most aspiring physicians take upon graduation from medical school. Now, you ...

In a multi-break firework, stars are contained in separate cardboard compartments within the shell. Each compartment has its own bursting charge, which ignites and throws out the stars. In order to ...

Heavy water is a form of water with a unique atomic structure and properties coveted for the production of nuclear power and weapons. Like ordinary water—H 2 0—each molecule of heavy water contains ...

How close were the Nazis to developing an atomic bomb? The truth is that National Socialist Germany could not possibly have built a weapon like the atomic bombs dropped on Hiroshima or Nagasaki. This ...

For most of us, or perhaps all of us, it's impossible to imagine a world consisting of more than three spatial dimensions. Are we correct when we intuit that such a world couldn't exist? Or is it that ...