Pictured: Dolphins are known to put themselves at risk to save humans from danger. Scientists are unable to explain this behaviour.
Wild dolphins go out of their way to save humans from drowning and from sharks. They bring drowning humans to the surface of the water to save them. A group of dolphins will go out of it's way to make sure the human is breathing, safe and strong enough to carry on, before leaving.
Also when a human is in danger from a shark, they have been known on numerous occasions to surround the human, scare away the shark, and escort the human safely back to shore. Or they stay with the human until the shark leaves before going on their way.
Scientists have a few theories but they have no real explanation as to why dolphins would bother saving humans. It is believed by most scientists that the dolphins are merely sympathetic & empathetic and just want to help. They have been documented rescuing people for over 2000 years.
Why do you think wild dolphins go out of their way to save humans from drowning and even sharks?
Some cases of dolphins saving humans from drowning:
http://www.eurocbc.org/page158.html
http://www.news.com.au/beluga-whale-...-1225756241559
http://www.irishcentral.com/news/Dol...125339033.html
http://www.neatorama.com/2008/12/19/saved-by-dolphins/
http://www.pbs.org/wnet/nature/episo...hris-cruz/136/
http://www.dailymail.co.uk/news/arti...ody-shore.html
http://www.dailymail.co.uk/tvshowbiz...surfboard.html
http://www.kajama.com/index.php?file...B29D&PageNum=1
http://www.underwatertimes.com/news....id=51079184603
http://www.telegraph.co.uk/news/ukne...n-Red-Sea.html
Dolphins save people from Sharks too:
http://news.bbc.co.uk/2/hi/4034383.stm
http://today.msnbc.msn.com/id/216890.../#.T9BMftVo23Y
http://www.cbc.ca/news/world/story/2...and041124.html
http://www.jweekly.com/article/full/...t-from-sharks/
http://news.bbc.co.uk/2/hi/asia-pacific/2145887.stm
Dolphins help save Whales:
http://www.science-frontiers.com/sf035/sf035p09.htm
They even save dogs:
http://www.earthweek.com/2011/ew110311/ew110311e.html