One of greatest sources for tektites is central and northern Thailand. Indochinite tektites are the best known of the tektites, classic teardrop and cigar shapes are found in rice paddies throughout the Thailand, Laos and Vietnam areas. At one time, these stones were believed to have originated on the moon, when meteoric impacts approximately 750,000 years ago blasted out lunar material which liquefied under the intense pressure and heat. The material solidified in the vacuum of space, normally stretching out into spinning dumbbells which separated into two teardrop shaped forms as they cooled. Their trajectory sent them toward Earth where they rained down on Thailand and Viet Nam. These tektites are the most recent; others date as far back as 14 million years. Another and more reasonable theory about tektites is that they are formed when a huge meteorite collides with the earth with such force that melted rock and meteoritic fragments are thrown at high speeds into the upper atmosphere. Here they cool and harden, preserving their splashed, melted shape. Tektites are found in areas that often our thousands of miles apart.