How is salt going to fight cavities?
by Zen Gardner
This was a wake up for me. I was traveling abroad last year and noticed the salt was fluoridated on every label I read. I wondered why but soon realized the mountainous countries I visited couldn’t possibly control the fresh water flow into...
Drops of Water on Mars?
Wednesday, February 18, 2009
NASA's Phoenix Mars lander is likely to end in May 2008 landed in a puddle of water on the red planet. Lead scientists to the analysis of photographs sent by the spacecraft. That drops his photos appear on the landing. This informs the...