• George W. Bush was the first President to have served kiwi fruit in the White House.

• The hummingbird will shed its beak two times before reaching adulthood.

• The United States' Flag Day is one of only six official holidays worldwide that pay homage to an inanimate object.

• The Vatican was officially opposed to leap years until 1989 because it interfered with the calculation of Easter.

• A recently-unearthed, 90-million-year-old ancestor of the duck had a continually-growing egg tooth that may have grown to a length of 6 inches. While its official name is Anatidae Xenosmilus, scientists have humorously nicknamed it the "saber-toothed duck."