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ZME Science on MSN

How Much Does a Single Cell Weigh? The Brilliant Physics Trick of Weighing Something Less Than a Trillionth of a Gram

It sounds like a strange question, but to biologists it makes all the sense in the world. Yeast cells tip the scales at about ...
Astronomy on MSN

How is the total mass of the universe calculated?

How is the total mass of the universe calculated? Bob GiddingsGreen Bay, Wisconsin Calculating the total mass of the universe ...