The original skeleton was a composite pieced together from fossils from 12 different animals. Conservators became concerned about the original when they discovered that years of temperature and humidity shifts and vibration had weakened the bones. Last week, the Smithsonian received the skull, which is 15 percent larger than the original. The complete new skeleton is expected to be unveiled next year. We'd all like to have more control over our hearts.
Crocodiles apparently do, literally.
This ability may allow crocodiles to stay under water longer by diverting oxygen-poor blood away from the lungs, the researchers speculated. Pheromone Communications Scientists have found new evidence that humans communicate at least to some degree through pheromones. Peter Mombaerts of Rockefeller University in New York and colleagues have identified the first good candidate for a molecule in humans that would allow them to receive signals with pheromones. Pheromones are chemical molecules, usually airborne and odorless, that many species use to communicate certain information with each other, such as whether they are appropriate mates and whether they are hostile or friendly. Mombaerts and his fellow researchers sifted through a database of human genes searching for something that resembled a protein known as a receptor that rodents use to receive pheromone signals.