Life is thought to need both water and the right chemicals to guarantee survival.

VOA: special.2010.05.25

he was looking for another city. He found Machu Picchu,actually, and mistakenly thought it was Vilcapampa for his entire life,"

VOA: standard.2009.12.15

"I thought that the American medical system was going to take away my life savings and essentially ruin any prospects I had for a pleasant retirement after the operation."

VOA: standard.2010.04.08