Marie Curie
Nikola Tesla
Albert Einstein
Isaac Newton
Out of those probably Marie Curie

For me it will have to Einstein, if you ever took physics at uni and attended classes on his theory's you'd soon realise that his brain was practically God like!

Gordon Freeman.
Man gets **** done!
A great lesson for a child.Superb choice. I was considering another post with Eratosthenes. Like you said, the calculations he made, with the precision he achieved, in the time in which he lived... Just incredible. It makes one yearn, more than ever, for the oppourtunity to delve into the depths of the library of Alexandria.As the OP asked for my favourite, as opposed to who I think made the greatest contributions:
Eratosthenes. More than 2200 years ago, he deduced ways to calculate the size of the Earth, the distance from the Earth to the sun and the distance from the Earth to the moon, without any equipment more advanced than sticks. He did a great deal else beside, as he was a remarkable polymath, but those really strike a chord with me. The methods he created are correct. His results might not have been accurate, but any inaccuracies were due to measuring errors. Eyeballs and sticks are not the right things to get very accurate measurements with.
More than 2200 years ago. With sticks. Awesome.

No quizzes -- I'm just interested to hear which bits of his work you find so underwhelming.oi oi !!! Cheeky
What do you want to quiz me over ?

http://en.wikipedia.org/wiki/Magnus_Pyke
This Guy. Used to love watching him on the telly when I was a Kid.![]()
Beaten
Greatest British scientist after Newton - Faraday without a shadow of doubt