In your lifetime, your heart will beat over 2.5 billion times and pump about 1 million barrels of blood – which circulates through your body 3 times a minute and travels 12,000 miles (the equivalent of 4 trips across the US) in a single day. ()

In 1926, Poland sent the US a birthday card with over 5 million signatures. Polish citizen Leopold Kotnowski visited the White House to present the card for America’s 150th birthday. It has 30,000 pages full of art, photos, poems and pressed flowers. Volumes 14-110 were digitized by the Library of Congress, and some are available online. (, , )