Sorting through piles of receipts and gathering other tax stuff together -- didn't I just do this? -- I thought of the old maxim "The only sure things in this world are death and taxes." Then I got to ...

THE point raised by Mr. Cumming in last week's NATURE (vol. xxxvii. p. 584), as to the use of the words density and specific gravity is, it seems to me, of some importance. For many years past I have, ...

Researchers are developing a new technique to help visualize the complex internal layering and anomalous structures inside planetary bodies, including the Moon. Credit: NGC 54/Wikimedia, CC BY-SA 4.0 ...

A urine-specific gravity test compares the density of urine with the density of water. The test may help healthcare professionals identify dehydration, a kidney problem, or a condition like diabetes ...