[DavidG]

I just whish I had some idea how it was possible cause I'd hate to be the sore loser that accusing someone of cheating just cause he beat me.
Tech trading is allowed in game and no AI players and 6 humans with only one dead so far.
To sum up the tech he has (that I know of):
Mines lvl 1 (and thus Constrution 1)
Ship Const lvl 4
Propulsion lvl 4
Religous tech lvl 4
Armour lvl 3 (and this Chemistry 1)
Stellar harnessing lvl 6
Explosive warheads lvl 3
Missle lvl 2
P.D. Weapons lvl 5 (and thus military science)
Projectile lvl 5.
and one extra colonization tech (likely from dead guy)