In science, there are thousands of ways to measure the world around us that the average person may never encounter. For example: Pascals to measure pressure, Candles to measure light intensity, and ...

Let me explain why I'm such an idiot. I was all pumped full of geeky excitement about the New Horizons probe's flyby of Pluto, and I wanted to commemorate the event with some sort of Pluto/automotive ...

I was surprised that C&EN would devote two columns to the letter by Harvey Carroll on the matter of atomic weight versus atomic mass (C&EN, Jan. 24, page 4). I realize the majority of the informed ...

Thank you for bringing to my attention the recent International Union of Pure & Applied Chemistry report “Atomic weights of the elements 2009” (C&EN, Dec. 20 ...

I AGREE with your correspondent, Mr. R. B. Hayward (NATURE, vol. xxxv. p. 604), in holding that names for the dynamical units are of less importance than a convenient notation for them. To invent ...

A nanogram (ng) is a unit of mass in the metric system, equal to one billionth (10-9) of a gram (g). The gram is a base unit of mass in the International System of Units (SI), making the nanogram a ...