Grandson Finds Priceless Secrets Buried Under Grandmother's Home

The More You Know

• Agatha Christie said she came up with many of her book plots while sitting in her bathtub while eating apples.
• The world's most toxic mineral is cinnabar.
• The Eiffel Tower was inaugurated the same year Nintendo was founded.
• There's a Russian village where every resident is a tightrope walker.