2 percent: the portion of Martian soil that was water in a recent analysis from the rover Curiosity
4: the number of aluminum mirrors in these telescopic contacts lenses
66: the number of radio dishes in the most ambitious ground telescope ever built
On the move
1969: the year scientists first used the word “flashback” to describe a reoccurrence of an LSD-like state (are acid flashbacks a myth?)
100 microns: the length of the magnetic nano-cages that could some day carry drugs into your brain or eyes
$449: the price of the new Microsoft Surface 2 tablet
19: the number of elements that got new official atomic weights this week, thanks to improved measurements
