A dry winter plus an early, warm spring equals a worrisome drought and fire situation across the western United States. Meanwhile, the pandemic has seen us all becoming a little more socially awkward. And, a chlorine shortage has ushered in “poolmageddon.” Also on the show: how the railroad industry survived its corrupt, dangerous early years, and why scientists gave tiny 3D glasses to cuttlefish. (AP Photo/Ringo H.W. Chiu)