World's longest hiccup attack - it lasted 69.5 years, while the sneezing attack last 978 days. The earth - the human body contains 60,000 miles of blood vessels. The earth's circumference is less than 25,000 miles. It is found in energy levels that surround the nucleus. An atom that gains electrons would be a negative ion.
Ice is the solid state of water.
In nature, diamond and graphite are pure forms of carbon. It is an alloy not a metallic element. One knot equals one nautical mile per hour. A waning moon appears to grow thinner. It is a star, while the others are constellations.