Three new books offer plenty of factoids that you didn't even know you needed.
The Book of Animal Ignorance: Everything You Think You Know Is Wrong (Harmony) by John Lloyd and John Mitchinson compiles fascinating animal facts: Milk is bad for cats, those manatees splashing in the bay may be having gay sex, and sheep are smart enough to teach their fields' boundaries to the next generation of lambs.
Don't Know Much About Everything Else (Harper) by Kenneth C. Davis is a catchall addition to the author's successful series, with tidbits about everything from the missing comma that caused the destruction of NASA's Mariner I to Winston Churchill's eventful career as a war correspondent.
The Pocket Idiot's Guide to Your Carbon Footprint (Alpha) by Nancy S. Grant helps clear up green confusion with definitions and tips on everything from energy use (how to tell a CFL from an OLED) to the food chain (organic food from afar may have a bigger carbon footprint than local nonorganic).
Colette Bancroft, Times book editor