Possible Clues:

• Chemist Bohr
• ___ Arden Oplev, director of 'The Girl With the Dragon Tattoo'
• Quantum mechanics pioneer Bohr
• Bohr played by Kenneth Branagh in "Oppenheimer"
• Copenhagen's ___ Bohr Institute
• Nobelist Bohr with a 32-Across named for him
• Manhattan Project member Bohr
• 19th-century Norwegian mathematician Abel
• Bohr who advocated sharing atomic secrets
• Bohr who was a contemporary of 67-Down