Captain America’s star-spangled shield can stand up against the universe’s most powerful forces all thanks to vibranium. This fictional and nearly indestructible element absorbs and releases huge amounts of kinetic energy. It is also the stuff of dreams for real materials scientists.

Caution: Superhero-sized spoilers below It's time to grab your infinity gauntlets, capes, hammers and shields, because Marvel movie days are back, and this time they come in the form of Captain America: Brave New World-in theaters starting today,

Many of the faces in Captain America: Brave New World haven’t been on screen since 2008’s The Incredible Hulk which starred Edward Norton in the role of Bruce Banner, later recast with Mark Ruffalo when The Avengers (2012) came out and the Marvel Cinematic Universe took off.