Julius von Sachs found that starch was a product of this process in green plants
The name of this 1877 invention is from the Greek for "sound writing"
Using a piece of Iceland spar, a French physicist polarized this in 1808
In 1848 he set absolute zero at -273 degrees C.; it was found later that it is actually -273.16 degrees
In 1815 William Prout hypothesized that this was the fundamental atom & all other atoms were made of it
On Oct. 15, 2003 it became the third country to launch a man into space; the Shenzhou 5 spacecraft orbited the Earth 14 times
In 1901 Eugene Demarcay discovered Eu, this rare-earth metal that's named for a continent
If an atom loses one of these, it becomes a cation, a positively charged ion
(Cheryl of the Clue Crew at the Eli Whitney Museum in New Haven, Connecticut) In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set
The tokamak, this type of nuclear reactor, uses plasma heated to 180 million degrees as fuel