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How do you weigh a 190 ton whale swimming at sea?
Oceanography

How do you weigh a 190 ton whale swimming at sea?

500 years ago, Luong Luong The Vinh solved the elephant weight puzzle of the Minh porcelain by dragging an elephant into a boat and measuring the water line. Now, to sol…

October 7, 2019
What is vitamin D?  Effect of Vitamin D
Medicine - Health

What is vitamin D? Effect of Vitamin D

Vitamin D is a group of fat-soluble secosteroids, which enhances the intestinal absorption of calcium and phosphate. In humans, the most important compounds in this grou…

October 6, 2019