Giant Crystal Cave comes to light. Mexico's Cueva de los Cristales (Cave of Crystals) contains some of the world's largest known natural crystals—translucent beams of gypsum as long as 36 feet meters).
Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees.
The Deepsea Challenger submersible begins its first test dive off the coast of Papua New Guinea. The sub, carrying James Cameron, descended to the deepest part of the Mariana Trench, at a cavernous depth of miles km).