Monday, April 23, 2007
What's this light at the end of the tunnel? This is really how it's like to be in an underwater cave that punges straight down for 200 feet. This kind of cave is called a blue hole. Pictured is one of the deepest in Abaco Island in the Bahamas, courtesy of Tamara Thomsen. The cave was formed during the last ice age in the Pleistocene Period when water melting from glaciers during a dramatic age of warming flooded vertical caves. Scientists hope to find lifeforms here that were long thought to be extinct.