Let′s face it, Indiana Jones was a pretty lousy archaeologist. He destroyed his sites, used a bullwhip instead of a trowel and was more likely to kill his peers than co-author a paper with them. Regardless, "Raiders of the Lost Ark," which celebrates its 30th anniversary on June 12, did make studying the past cool for an entire generation of scientists. Those modern archaeologists whom "Raiders" inspired luckily learned from the mistakes of Dr. Jones, and use advanced technology such as satellite imaging, airborne laser mapping, robots and full-body medical scanners instead of a scientifically useless whip.

Such innovations have allowed archaeologists to spot buried pyramids from space, create 3-D maps of ancient Mayan ruins from the air, explore the sunken wrecks of Roman ships and find evidence ofheart disease in 3,000-year-old mummies. Most of the new toolkit comes from fields such as biology, chemistry, physics or engineering, as well as commercial gadgets that include GPS, laptops and smartphones.

"If we dig part of a site, we destroy it," said David Hurst Thomas, a curator in anthropology at the American Museum of Natural History in New York. "Technology lets us find out a lot more about it before we go in, like surgeons who use CT and MRI scans."

Archaeologists have harnessed such tools to find ancient sites of interest more easily than ever before. They can dig with greater confidence and less collateral damage, apply the latest lab techniques to ancient human artifacts or remains, and better pinpoint when people or objects existed in time.

Satellites mark the spot

One of the current revolutions in archaeology relies upon satellites floating in orbit above the Earth. Sarah Parcak, an Egyptologist at the University of Alabama in Birmingham, and an international team recently used infrared satellite imaging to peer as far down as 33 feet (10 meters) below the Egyptian desert. They found 17 undiscovered pyramids and more than 1,000 tombs.

The images also revealed buried city streets and houses at the ancient Egyptian city of Tanis, a well-known archaeological site that was featured in "Raiders of the Lost Ark" three decades ago.