Help make Alexa smarter on Alexa Answers. Sign in with Amazon

Science

Are blue holes real?


Yes, a blue hole is a large marine cavern or sinkhole, which is open to the surface and has developed in a bank or island composed of a carbonate bedrock. Their existence was discovered in the late 20th century by fishermen and recreational divers. They are called that because they are deep blue.

{{ relativeTimeResolver(1655742934186) }}

LIVE
Points points 7
Rating

Similar Questions
Sign in to view all similar questions
Science 2 Answers
Science 4 Answers
Science 3 Answers

Join Alexa Answers

Help make Alexa smarter and share your knowledge with the world

LEARN MORE