GWShenlong05:

Adamantium cannot be penetrated by any other solid object.

However, a light-saber is not exactly solid. It is a grouping of accelerated particles. It doesn't so much cut as it simultaneously separates and overheats the component molecules of any object it comes into contact with.

So the answer is yes.

Wow.

Just... wow.

never odd or even: Could either cut through Superman?

Well that would depend on the source of Superman's matter-deflecting power, as evidenced by his ability to withstand bullets. This, however, can be accomplished by any sufficiently hard material or by an energy field.

If the bullets actually touch Superman's chest, then yes, he could be killed by both an adamantium bullet (and/or claw) or a lightsabre. He is constructed of matter like the rest of us, but merely has superhuman abilities due to being an alien. If adamantium cannot be destroyed by any known matter, then Superman's molecules, however dense, would not deflect the bullet.

If Superman projects some sort of thin energy field around his body which prevents them from touching his chest, the adamantium would still be deflected but the light sabre might slice through it. That would depend on the particle interactions between the light sabre and the energy field in question. Most known energy fields would simply redirect the light sabre's particles around Superman. For instance, you would see the sabre touch him and then spread out behind his back. The wielder might actually be affected by some of those particles deflected back at him.

/also a nerd

tonkin:

Dude maybe if Superman was weakened by the kryptonite first, then you could kill him with the light saber.

An interesting point. That Superman's lack of strength as a result of kryptonite poisoning means he can be killed or restrained by mundane objects would imply that the case is, in fact, a small consciously-maintained energy field around his body. This is similar to the Green Lantern.

Ok I'm done. Seriously. Don't laugh at me.

Custom5:

The speed of the adamantium bullet would actually have to reach a speed much, much faster than that of a normal bullet to actually have any real effect.

Right. Adamantium is supposed to be incredibly light, right? Kinetic energy and all.

Maybe an adamantium rail gun. That would imply that adamantium could be manipulated by magnetic forces, though, which I'm pretty sure Magneto has used on Wolverine in one of the two movies. Rail guns work by magnetically accelerating the projectile in an incredibly short period of time. Thus, an adamantium rail gun would theoretically be possible.

Aw, Mel, we were just getting started! I even turned it to electromagnetism for you!

MelLuvsDMB: Oh.My.God! I think that just sent me over the edge.....

Hey, you never IMed me. I had to do SOMETHING to seduce you...

(Psst ... I'll electrify your body using Coulomb's law!)

What about upsidaisium? That's some anti-gravity material from Rocky and Bullwinkle. Not only am a nerd, but I watch old cartoons.

GWShenlong05:

So, with your theoretical rail gun situation, the bullet's collision could cause both a momentary flash of intense heat and light, followed by the mother of all Ka-POWs. But Superman's skin wouldn't necessarily be punctured.

Very true. We'd have to hone the point of the hypothetical bullet to the size of a Superman skin cell, so it would work its way between components of his flesh, and work out the aerodynamics of the rest so that the air resistance did not deform the bullet in transit.

Custom5:

I did not see this before posting what I just did, I'm feeling very Bizarro smart right now.

Isn't "Bizarro" from Superman to begin with?

mrjared:

Plus, wouldn't they have had to cut the adamantium somehow in order to shape it or whatnot to fit on Wolverines bones? If they had the tech in the US army to do that, well, then, I think a Lightsaber would cut right through it.

They form it while it's still liquid. When it cools and hardens, it cannot be damaged in any way.