For decades, one issue has been driving people apart. No, I'm not talking about immigration, global warming or abortion. I'm talking about whether or not Luke Skywalker's lightsaber can cut through Captain America's shield.

Disney owns both the Marvel and Star Wars franchises, but they exist in different universes. It's unlikely we'll ever see them cross over on the big screen. So, nerds are left to furiously discuss the topic as they camp out overnight to get into Hall H at Comic-Con.

But thanks to Twitter, we can ask the stars of the movies for answers. A father tweeted the pressing question to Chris Evans and Mark Hamill: "My son just asked the toughest question I've ever had to answer as a father... Can a lightsaber cut through Captain America's shield?"

Mark replied, "In the #MarvelUniverse- NO" Ha-ha! Victory for Captain America, The First Avenger! Suck it, Luke, you whiny farm boy!

However, that's only part of the tweet. Mark continued, "In the #StarWarsUniverse- Luke wouldn't fight a hero, but if asked to do so, he could cut it into a million little pieces." Ha-ha! Victory for Luke Skywalker! Why don't you go back to the 40's, Steve Rogers, you uptight dork?

Chris Evans chimed in, tweeting, "Foolish. Now I have vibranium ninja stars." Well-played! But remember, Luke can do a Force Choke, plus whatever they call that Avatar Trick he pulled at the end of The Last Jedi.

Some Twitter users shared creative Captain America meets Star Wars artwork.

But as impressive as these portraits are, how about a more scientific answer? Nerdist' Kyle Walsh analyzed this issue in a 2016 episode of Because Science.

"A lightsaber, if it were real, would probably be a tightly coiled ring of unbelievably hot plasma. Captain America’s shield, on the other hand, is an alloy of the mysterious metal known as vibranium, steel, and a pinch of an unknown ingredient. Vibranium is said to be, for all intents and purposes, indestructible. So how would it hold up against a Sith strike?

To find out, we have to make a few concessions. While comic fans will point out that vibranium cannot be melted after it sets, that’s just not how materials work in the real world. In fact, when one material is alloyed with another, the combination’s melting point is often lower than either component’s individually. Steel, for example, has a lower melting point than either iron ore or carbon."

So, using that logic what answer does Kyle arrive at? Luke Skywalker's lightsaber will cut through Captain America's eventually. Vibranium can absorb kinetic energy, so Captain America could feasibly block light saber hits for a little while. However, the light saber is hot - possibly ten times as hot as the center of the sun, so the supposedly indestructible shield would melt at some point.

There you have it. Although Kyle's argument doesn't include the possibility of vibranium ninja stars.

For decades, one issue has been driving people apart. No, I'm not talking about immigration, global warming or abortion. I'm talking about whether or not Luke Skywalker's lightsaber can cut through Captain America's shield.

Disney owns both the Marvel and Star Wars franchises, but they exist in different universes. It's unlikely we'll ever see them cross over on the big screen. So, nerds are left to furiously discuss the topic as they camp out overnight to get into Hall H at Comic-Con.

But thanks to Twitter, we can ask the stars of the movies for answers. A father tweeted the pressing question to Chris Evans and Mark Hamill: "My son just asked the toughest question I've ever had to answer as a father... Can a lightsaber cut through Captain America's shield?"

Mark replied, "In the #MarvelUniverse- NO" Ha-ha! Victory for Captain America, The First Avenger! Suck it, Luke, you whiny farm boy!

However, that's only part of the tweet. Mark continued, "In the #StarWarsUniverse- Luke wouldn't fight a hero, but if asked to do so, he could cut it into a million little pieces." Ha-ha! Victory for Luke Skywalker! Why don't you go back to the 40's, Steve Rogers, you uptight dork?

Chris Evans chimed in, tweeting, "Foolish. Now I have vibranium ninja stars." Well-played! But remember, Luke can do a Force Choke, plus whatever they call that Avatar Trick he pulled at the end of The Last Jedi.

Some Twitter users shared creative Captain America meets Star Wars artwork.

But as impressive as these portraits are, how about a more scientific answer? Nerdist' Kyle Walsh analyzed this issue in a 2016 episode of Because Science.

"A lightsaber, if it were real, would probably be a tightly coiled ring of unbelievably hot plasma. Captain America’s shield, on the other hand, is an alloy of the mysterious metal known as vibranium, steel, and a pinch of an unknown ingredient. Vibranium is said to be, for all intents and purposes, indestructible. So how would it hold up against a Sith strike?

To find out, we have to make a few concessions. While comic fans will point out that vibranium cannot be melted after it sets, that’s just not how materials work in the real world. In fact, when one material is alloyed with another, the combination’s melting point is often lower than either component’s individually. Steel, for example, has a lower melting point than either iron ore or carbon."

So, using that logic what answer does Kyle arrive at? Luke Skywalker's lightsaber will cut through Captain America's eventually. Vibranium can absorb kinetic energy, so Captain America could feasibly block light saber hits for a little while. However, the light saber is hot - possibly ten times as hot as the center of the sun, so the supposedly indestructible shield would melt at some point.

There you have it. Although Kyle's argument doesn't include the possibility of vibranium ninja stars.