Old bones match old stones
نویسندگان
چکیده
منابع مشابه
Flaked stones and old bones: biological and cultural evolution at the dawn of technology.
The appearance of Oldowan sites ca. 2.6 million years ago (Ma) may reflect one of the most important adaptive shifts in human evolution. Stone artifact manufacture, large mammal butchery, and novel transport and discard behaviors led to the accumulation of the first recognized archaeological debris. The appearance of the Oldowan sites coincides with generally cooler, drier, and more variable cl...
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Kidneystonesareamajorcauseofmorbidity, andresult in .$5 billion of health care costs annually (1). In the United States, the prevalence of nephrolithiasis increases with age but is approximately 11% for men and 7% for women (2). Although kidney stone composition varies by age, sex, body size, and a variety of comorbidities, calcium-containing kidney stones are the most common and account for .8...
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A 46 year old man was referred to hospital by his general practitioner with abnormal bone biochemistry. He had presented with poor appetite, fatigue, myalgia, and backache. Serum calcium, corrected for albumin, was 2.63 mmol/litre (reference range, 2.12–2.62), serum phosphate was 0.85 mmol/litre (normal range, 0.7–1.4), and alkaline phos-phatase was 367 IU/litre (normal range, 80–280). There wa...
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ژورنال
عنوان ژورنال: Nature
سال: 1992
ISSN: 0028-0836,1476-4687
DOI: 10.1038/355678a0