Space travels of an unlikely duo

    On its surface, Project Hail Mary sounds like another large-scale space adventure, a movie in which a lone traveler must save the Earth when a virus threatens to dim the sun. A mysterious microbe known as Astrophage is responsible for this doomsday scenario.   Fortunately, Earth has hope for survival, albeit a slim one. The future of humanity depends on a molecular biologist -- Ryan Gosling's Ryland Grace -- traveling 11.9 light-years to Tau Ceti, a star that’s immune to Astrophage. Perha...