The sun bear would win. Chimps and a lot of other creatures that are similar in size to people are a hell of a lot stronger and more ruthless. Sun bears have much stronger bones and joints. IMO I think one of the reasons martial arts were invented was to compensate for humans' lack a strength compare to other animals. People have to learn how to fight, while animals have natural instincts. A human would have to use a weapon to kill a bear. Grizzly bears are almost impossible to kill, unless you have a REALLY powerful gun or canon.

Lets put it this way dude, if we as humans have created a type of ammunition to either kill or capture the particular animal in question, then it is safe to say we cannot beat it in hand to hand combat

The human would get a weapon and kill the bear...

End of fight

What is up with all these human vs animal questions?

Why? This is just stupid.

You try it and let us know how it goes.

The human is a 21 year old male, 5'10 and weighs 175 pounds, trained in mma and boxing, and the sun bear is a 100 pound male in its prime. Both are willing and up for a fight to the death. Who wins?