What is so significant about the Blue Holes to the story of the Bahamas is that they are nature's vehicle for time travel. Blue Holes allow us to see millions of years into our incredible past.
In 1991, 2004, 2007, 2009 various divers researching and exploring the Sawmill Sink and Dan's Cave, blue holes, in Abaco and other blue holes like the Stargate blue hole in Andros and Dean's Blue Hole in Long Island found incredible evidence of fossils dating back to the Late Holocene period that began around 12,000 B.C., just after the massive ice and glaciers from the last ice age had started to melt.