منابع مشابه
Cancer in Wild Animals
Cancer seems to affect all animals, from anteaters to zebras. Much less is known about the cancers that affect wild animals, in part because it is hard to study. Animals move around and may not be easily observed for long periods of time. The cancers that have been studied are very interesting and will certainly prove useful in the study of human cancer. As an example, Tasmanian devils have a t...
متن کاملThe Care of Skulls and Skeletons of Small Animals.
or in Van Giesen picrofuchsin. As an instance typical of the ease of use and reliability of the stain, a series of slides was stained for different lengths of time in a trial lot of this solution which contained only 10 grams each of ferrous and ferric alum, instead of the 20 as above described. The slides were then counterstained with Van Giesen picrofuchsin (5 minutes) in the usual manner. Th...
متن کاملAnabolic actions of PTH in the skeletons of animals.
A brief historical perspective reviews studies that tested the hypotheses that PTH induces an anabolic effect in bone, and that the gain in trabecular bone was not at the expense of cortical bone. As PTH reduces the risk of fracture in humans with osteoporosis, the myths that postulated cortical bone porosity and increased bone turnover might increase fracture risk, are examined in the light of...
متن کاملRestoring America's big, wild animals.
ered on a ranch in New Mexico to ponder a bold plan. The scientists, trained in a variety of disciplines, ranged from the grand old men of the field to those of us earlier in our careers. The idea we were mulling over was the reintroduction of large vertebrates—megafauna—to North America. Most of these animals, such as mammoths and cheetahs, died out roughly 13,000 years ago, when humans from E...
متن کاملWild Animals in Daily Life
Humans have historically low engagement with the natural world. Global urbanization has led people to abandon wildlife-rich landscapes. The current lack of connectedness to nature is known as nature-deficit disorder. However, to encourage sustainable relationships between humans and other animals, technology to reconnect is urgently needed. The natural world is in a dire state; we are in the mi...
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ژورنال
عنوان ژورنال: Nature
سال: 1872
ISSN: 0028-0836,1476-4687
DOI: 10.1038/007046b0