Wow, not a single astronaut/cosmonaut on the list! You'd think landing on the moon would rate in the top 10!

Explorers? Apart from Messner and Amundsen this list is a joke: Ever heard of Fridtjof Nansen, Eric Shipton, Bill Tilman, Sven Hedin, Sir Ranulph Twisleton-Wykeham-Fiennes, Wilfred Thesiger,............. Lynn Hill, yeah she's a great climber but greatest explorer since 1900. Ha!

I'd have to go with Fridtjof Nansen (for those who don't know about him, google him), but he did most of his exploration work in the 1890s, so maybe he missed the list because of the time (since 1900).

Got to point out that the title says 'adventurers' not 'explorers', but even so there are too many 'single sport' specialists in this list. Ran Fiennes would be top of my list for the sheer diversity of his expeditions (circumnavigating the world via the poles, finding a lost desert city of Ubar, manhauling to the pole, climbing Everest, running 7 marathons on 7 continents.....)

...and I should also point out that Mike Horn should be on this list too!

Arlene Blum should be somewhere close to being on some list. Just sayin.

George Leigh Mallory has to be on this list for pushing boundaries in a different era and for truly embodying the spirit of a fearless trail blazer!

You guys need to get over your man-crush on Laird Hamilton. His constant presence in Outside is a bit much--he seems to get mentioned in every issue somehow. Messner was definitely out there on the pointy end of the stick. Stud.

I have to agree with the guy who said Fridtjof Nansen. Nansen was the first person to cross Greenland, and for a time had been farther north than anyone ever had been before. He was also a pioneer in Neurology and fluid dynamics discovering many of the ocean currents that dominate the Artic ocean, as well as the winner of the Nobel peace prize for his humanitarian work in Russia, and it was him not Roald Amundsen, or Thor Heyerdahl that won Norwegian of the 20th century. He also uttered, in my opinion the best quote ever, "It is better to go skiing and think of God, than go to church and think of sport. "

I have to agree with the guy who said Fridtjof Nansen. Nansen was the first person to cross Greenland, and for a time had been farther north than anyone ever had been before. He was also a pioneer in Neurology and fluid dynamics discovering many of the ocean currents that dominate the Artic ocean, as well as the winner of the Nobel peace prize for his humanitarian work in Russia, and it was him not Roald Amundsen, or Thor Heyerdahl that won Norwegian of the 20th century. He also uttered, in my opinion the best quote ever, "It is better to go skiing and think of God, than go to church and think of sport. "

What about Eric Shipton and Bradford Washburn?

John Wesley Powell,self explanatory Dervla Murphy, not a joke, look her up

You were right on with Amundsen!! About time he was given credit for all he did.

You were OK with Amundsen!! However, I cannot believe you omitted Earnest Shackleton from that list!! True, he did not discover the South Pole and sail the Northwest passage like Amundsen and yes, he got his expedition in trouble when he got iced in. However, he led his sailing team through an incredible ocean voyage in the most dangerous sea in the world: The Southern Ocean! Plus, he came back and rescued the remainder of his men without losing a single man!

Im really glad that Shane McConkey was on the list. He was a skiing pioneer and an inspiration to all adventurers.

What about Eric Shipton, Bill Tillman and Steve Fossett? Surely these guys should be on the list.

I'll give you Amundsen for sheer technical ability, but when it comes to adventurers, wouldn't you rather have the guy who has proven he can get you out of a jam? After all, isn't part of adventure being able to conquer the unknown - even if the unknown is all about nothing working out? From Apsley Cherry-Gerard's book about his travels with Scott, "Give me Scott for scientific method, Amundsen for speed and efficiency but when disaster strikes and all hope is gone, get down on your knees and pray for Shackleton."

Ernest Shackleton & The Endurance?

Martin and Osa Johnson explored and filmed the world from 1910 to 1937. They brought back tales of remote peoples, exotic lands, breathtaking wildlife. The excitement of their adventures lit up the silverscreen in 35 feature films and travelogues! www.SafariMuseum.com

Not surprising that two Norwegians are in the top 10! That Viking Blood produced some great adventurers. I found a facebook group (Visit Norway) that has an all expense paid Adventure Promotion going right for a FREE TRIP FOR TWO TO NORWAY. Not sure if anyone else is interested. Check it out, it looks like it would be a really great trip!

Somebody there needs to do a much better research job before you come up with this list. Doug Ammons shouldn't be on the first list let alone the top 10. His solo of the Stikine GC is a legitimate chapter in the canyon's whitewater history by someone familiar with the run. A more valid solo whitewater adventure would be Walt Blackadar's in 1971 of Turnback Canyon on the Alsek, a run no one had ever considered. Or how about Ed Gillet's 63 day sea kayak paddle from Monterey to Hawaii in 1987. Or Ed's earlier paddle up the entire west coast of South America over 13 months. A 3 day paddle down a challenging but familiar run does not merit consideration in Top Adventurers Since 1900.

You would think Admiral Byrd would be up there because of his time adventuring alone in Antarctica

I'd go with Justin here: Ranulph Fiennes - I like my explorers to be alive and multi-activity. We just took this explorer onto our books, he takes an interesting view of exploring - not at all interested in proving himself or conquering anything. http://tinyurl.com/y97nr3y

How about Joseph William Kittinger II? Record Parachute Jump from 102,800 ft and first solo crossing of the Atlantic in a gas ballon among many other records. Collectively the Apollo Astronauts and Explorer Percy Fawcett

Heinrich Harrer should be on this list. His Seven Years in Tibet were an unprecedented adventure, as was being a member of the first party to climb the Eiger. I agree with those who suggested Dervla Murphy, Eric Shipton, Bill Tilman and Bradford Washburn.

This is a joke! My good friend and mentor the late Steve Fossett did it all and never stopped. And would have continued if he had lived on. I just wanted to see what others had to say. I won a contest like this with another magazine when I brought Fossett's name up. No one can compete with someone who has done it all. If you don't know what that means, then look him up and read.

Joshua Slocum - first man to sail around the world solo. Great book, too.

All these famous people have nothing on the former All American and NCAA diver, Tom Haig. Go to www.captaincrip.blogspot.com and start at the bottom. Puts everyone else to shame.

I had got a dream to start my firm, but I didn't have got enough of cash to do this. Thank heaven my dude told to take the home loans. Therefore I received the collateral loan and made real my dream.

All nomadic peoples are adventurers by nature but I think that the adventuring done by the Polynesians looking for new islands was absolutely the most balls to the wall, do or die, missions ever done. They would travel past the point of no return and lay their lives in luck, there must be countless Polynesians that did not discover land and sacrificed their lives to the sea. The only argument against the Polynesians being the greatest adventurers of all time is that they traveled out of fear and despair and their motivations were not pure.