News
- Animals
Cousin Who? Gliding mammals may be primates’ nearest kin
Two species of small, little-known rain forest mammals may be primates' closest living relatives.
- Health & Medicine
Early Arrival: HIV came from Haiti to United States
New analysis of 25-year-old blood samples indicates that HIV reached the United States in about 1969, 12 years before AIDS was first formally described.
- Paleontology
Meet the old wolves, same as the new wolves
The dire wolf, an extinct species preserved in abundance at the La Brea tar pits, seems to have had a social structure similar to that of its modern-day relatives.
- Paleontology
Dinosaurs matured sexually while still growing
Distinctive bone tissue in fossils of several dinosaur species suggests that the ancient reptiles became sexually mature long before they gained adult size.
