National Geographic : 1999 Jan
TWO GOOD EGGS "This is something nobody had ever seen before," says Luis Chiappe (above, at right), who with expedition co-leader Lowell Dingus found fossilized sauropod dinosaur embryos in Pata gonia complete with patches of skin. In the rotunda of their home base, the Ameri can Museum of Natural His tory in New York City, they hold two egg-and-embryo fossils beneath the mounted skeleton of a full-grown female sauropod. A CLOSER LOOK Rocks like this one containing a fossilized hominid tooth, found in a South African quarry, loom large in Lee Berger's view of human ori gins. His finds at sites near Johannesburg may some day lead to a redrawing of humankind's family tree. Winner of the 1997 National Geographic Research and Exploration Prize, the Uni versity of the Witwatersrand scholar has also helped record and preserve 117,000 year-old human footprints.