"Our research shows that, at times, tiger sharks and thresher sharks don't swim randomly but swim to specific locations, " said research leader Yannis Papastamatiou from the Florida Museum of Natural History in Gainesville.
Mr Reynolds had been camping on the island and when he woke to find the tide rising he attempted to swim to shore, but never made it.
BBC: NEWS | UK | Wales | South West Wales | Rescue as swimmers ignore danger
The report also includes a survey of more than 1, 000 parents which showed almost all (98%) believed every child should be able to swim by the end of primary school but only 40% thought their children would be able to swim to safety if they got into danger in the water.
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But if you decide to swim into the deep end of the pool, ask yourself why.
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"I don't know how to swim, but somehow I made it to shore, " she recalled in a teleconference with reporters this week.
The Devon Wildlife Trust said deer were known to swim, but it was not sure how the animal ended up in the Sound.
We clustered around it, but rather than swim back to the boat to get a spear from Sam, I stupidly tried to grab the lobster with my bare hand.
"It might surprise some to learn that a species so well adapted to living around water actually needs to be taught how to swim, but that's exactly what happens, " he said.
The hotel manager told me that tourists did swim in the lake, but he had not heard of anyone trying to swim across it before.
BBC: Long-distance swimming in Nepal��s glacial mountain lakes
Suu Kyi's lawyer has said his client asked Yettaw to leave her home immediately, but Yettaw refused, first saying he didn't want to swim in daylight for fear of being captured, and later blaming leg cramps.
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We start out willing to fail as we learn to walk and talk and swim and ride a bike, but somewhere along the line we come to think that we have to get it right first time, every time, before even starting out.
Mose yelled at Strange to swim to the rocks, but it was too late.
But few go in search of a place to swim.
BBC: Long-distance swimming in Nepal��s glacial mountain lakes
There's only one highway that connects Costa Rica and Nicaragua (I walked across it, shown above), but you can totally swim from one country to the other if you aren't afraid of circumventing authority.
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Breanna joined a dance class and a swim team, but her weight continued to climb.
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But Liam decided to go one better and jumped in for a swim and a laugh.
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But Adlington produced a second peerless swim in as many days to win the 400m freestyle , with Jazz Carlin swimming to bronze behind her for Wales.
Instead the message was: these are serious "sink or swim" times, but we're on the way to making Britain great again.
"It wasn't a great swim, I wanted to go seven seconds quicker, but it's a gold medal, " he said after the race.
Nearly 50 other swimmers have completed the swim since then, but Annaleise is the youngest, according to Solo Swims of Ontario, a non-profit group that monitors the safety of long-distance swims.
Phelps earned the right to swim the butterfly leg after winning the 100m final on Friday but later announced he would give up his spot to Crocker.
Divers swim close to 100 feet down to an environment that is anything but friendly.
Rescuers eventually lowered Davitt toward police boats, but when he got within about 10 feet he leaped into the river and tried to swim away.
In that sea of startups, some will undoubtedly sink but many more will swim and the ones that do find dry land will want to begin establishing a rapport, and eventually a partnership, with other like-minded businesses in their industry.
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But that actually hurt her shoulders, so she stopped trying to do it and decided to swim in the manner that felt most comfortable to her.
They probably won't take down the drug Goliath--but they could make it harder for pharmaceutical giants to keep their heads above water as they swim from one blockbuster drug to the next.
He drew on his experience travelling the globe, witnessing the rise not just of China and India but Mexico, Brazil and Indonesia too, to warn that Britain faced a "sink or swim, do or decline" choice about the future.
But 30 years after she took her last stroke, on her 60th birthday, Nyad began to swim against a new current: age.
Jonny, 22, had to receive medical treatment after the race but showed guts and determination to take third after being penalized for mounting his bike too soon after the swim.
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