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Genes aren't the sole driver instructing cells to build multicellular structures, tissues, and organs.

Harden, who moved into sole possession of second place on the NBA’s all-time three-pointer list Sunday, still found a way to play nearly 41 minutes despite not feeling well.

In a sport where players operate as sole traders for the majority of the year, switching from a mindset of pursuing individual glory to achieving a common goal can be tricky.

He brings the same versatility to his sole offensive position for the Chargers.

Djokovic holds two more Grand Slam trophies than Nadal and is still chasing his 25th to take sole ownership of the all-time record for the most major singles titles he shares with Margaret Court.