Sharks are older than trees — sharks appeared about 400 million years ago, trees about 350 million

There are about 7,000 languages in the world — one goes extinct roughly every two weeks

Languages face extinction at a rate of approximately 14 per year

The observable universe is about 93 billion light-years in diameter

The observable universe spans approximately 93 billion light-years across

The footprints on the Moon will last millions of years — there's no wind or water to erode them

Moon's lack of atmosphere and liquid water preserves footprints indefinitely

Your DNA stretched end to end would reach the Sun and back over 600 times

Human DNA length: 2 meters, Sun-Earth distance: 150 million km, repetitions: 900,000,000

The printing press was invented by Gutenberg around 1440 — but China had movable type 400 years earlier

Gutenberg's press, circa 1440, followed China's 1000-year-old movable type innovation

Beer was first brewed around 5,000 BC in Mesopotamia — some of the oldest recipes survive

Beer originated circa 5,000 BC in ancient Mesopotamia