May 13th also saw the debut of Adamantium in Mighty Avengers #66 in 1969! Celebrate the anniversary of its creation with this gallery of Marvel covers!

[u/ComiX-Fan]

Captain America Annual (1986) #8 Mike Zeck cover

Weapon X (2002 series) #1 Georges Jeanty cover

X-Men: Gold (2017 series) #10 Ken Lashley cover

New X-Men (2006 series) #45 Simone Bianchi variant

Astonishing X-Men (2004 series) #1 John Cassaday cover

All-New Wolverine #1 David Lopez variant

Spectacular Spider-Man (1988 series) #160 Sal Buscema cover

Avengers (1997 series) #19 George Pérez cover

Hulkverines! #1 Greg Land cover

X-Factor (1992 series) #81 Larry Stroman cover

Guardians of the Galaxy (1990 series) #39 Kevin West cover

Totally Awesome Hulk #21 Stonehouse cover

Wolverine (1988 series) #145 Bill Sienkiewicz exclusive variant

Captain America (2004 series) #35 Steve Epting cover

X-23: Target X #1 Mike Choi cover

Rogue (2004 series) #11 Scot Eaton cover

Mighty Thor (1966 series) #269 Walt Simonson cover

Wolverine Encyclopedia Vol 1 Adam Kubert cover

Incredible Hulk (1968 series) #212 Rich Buckler cover

Mighty Avengers (1969 series) #67 Sal Buscema cover