Chinese scientists have unearthed the oldest short-tailed bird fossil, dating back about 150 million years, in east China's ...
FUZHOU, Feb. 13 (Xinhua) -- Chinese scientists have unearthed the oldest short-tailed bird fossil, dating back about 150 ...
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This massive circular structure is made entirely of mammoth bones and skulls. DNA now offers clues about how Ice Age hunters built itThe Kostenki 11 site, located near the Don River, just 300 kilometers from Moscow, is one of the most significant Upper ...
Feb. 11, 2025 — Researchers have discovered a new mechanism that is used by a male sex hormone essential for muscle and bone function. The findings could lead to the development of new drugs ...
Free body diagrams do not need to be drawn to scale but it can sometimes be useful if they are. It is important to label each arrow to show the magnitude of the force it represents. The type of ...
Vitamin D synthesis—which takes place in the skin—promotes calcium absorption. Calcium is needed for the growth and maintenance of bones, as well as for muscle contractions. The endocrine system ...
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