Puzzle News Computer game helps nurses master drug calculations Position-based quantum cryptography: New method for securing location-sensitive data Taking computer games into the future Gender gap persists at highest levels of math and science testing, 30-year study finds When screen time becomes a pain Major step ahead for cryptography Sum of digits of prime numbers is evenly distributed: New mathematical proof of hypothesis NIST releases successor to venerable handbook of math functions US needs better-trained math teachers to compete globally, study finds