400 years ago lead was harnessed to wood and thus pencils were born! Today, most pencils are made of graphite surrounded by a wooden shell. The average pencil can draw a line for about 35 miles! If you're not drawing 35 mile long lines you could be writing words, about 45,000 words is the average life span of a graphite pencil.
The Human Heart is pretty amazing! It's the power house of our circulatory system. One muscle with four chambers that pumps about 1900 gallons of blood every single day! That's pretty impressive considering that this vital organ only weighs about 10 ounces. Don't let size fool you though, the heart's work goes a long way, literally! The average adult human circulatory system can actually reach about 60,000 miles.
Painter, inventor, scientist, and all around smart guy, Leonardo Da Vinci, once said: "The human foot is a masterpiece of engineering and a work of art."
Now is a great time for science. New inventions, discoveries, and groundbreaking research are constantly improving the quality of our lives. Women scientists have contributed greatly to our understanding of the world. Marie Curie helped us understand the very nature of the atom and radioactivity. Grace Hopper helped unlock the power of computers. Sally Ride and Mae Jemison helped us to understand the cosmos.