Word: genuses
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...sites near Lake Turkana, in Kenya. Not only is the new hominid very old, dating to 4.2 million years B.P., but it is similar in some ways to A. afarensis--though clearly more primitive. Given the family resemblance, Leakey and Walker assigned the fossils to the same genus, Australopithecus, and gave the new species the name anamensis (anam is the Turkana word for lake...
...successful species. Between 3 million and 1.9 million years B.P., several variations on the Australopithecus theme popped up in eastern and southern Africa, including A. africanus, A. aethiopicus, A. robustus and A. boisei. (Just to complicate matters, the last three are assigned by some experts to an entirely different genus, Paranthropus...
Whatever the evolutionary relationships between these prehuman species, paleoanthropologists know that at some point a second major shift took place. One of Lucy's descendants gave rise to a new kind of creature, the first of the genus Homo. Yet none of the known variants of Australopithecus seemed anatomically close enough to the Homo line to qualify...
...larger braincase. So they named their hominid Australopithecus garhi (garhi means surprise in Afar). But the skull's intermediate anatomy and its age--about 2.5 million years--put it midway in both time and form between the most recent A. afarensis and the oldest known fossils of our own genus...
...deer tick, or another member of the genus Ixodes, attaches to your body and starts sucking your blood, also swallowing the antibodies triggered by the vaccine. If all goes well, the antibodies then kill the Lyme-causing spirochetes in the tick's saliva and intestine. Twenty-four hours later, the tick drops off your body, and you're none the worse for wear. Booster shots will probably be required every few years to keep your antibody levels high...