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DK Space: Space

WHERE DOES SPACE BEGIN? WHERE IS EARTH IN SPACE? HOW MUCH SPACE IS THERE? WHAT IS A LIGHT-YEAR? WHAT CAN WE SEE WHEN WE LOOK INTO SPACE? JOURNEY INTO SPACE FIND OUT MORE When you…

DK Science: Mercury

FIND OUT MOREMercury is the planet closest to the Sun, and experiences scorching temperatures by day. But it has virtually no atmosphere to trap the heat, so is freezing at night. It is a…

The Circumference of the Earth

The Question: What is the circumference of the Earth? The Answer: At the equator, the Earth's circumference is 24,830 miles (40,000 km…

Ron Clarke

Born: Feb. 21, 1937Australian runner from 1963-70 set 17 world records in races from 2 miles to 20,000m; never won Olympic gold medal.

Roger Bannister

Born: Mar. 23, 1929British runner first to run mile in less than 4 minutes (3:59.4 on May 6, 1954).

Titanic: The Anniversary of the Sinking of the World's Most Famous Ship

The world's most famous ship sunk on April 15, 1912 by Beth Rowen The Ship vs. The Film • Titanic, the ship, was one of the largest movable objects ever built, measuring in at 883 feet…

Barney Oldfield

Born: Jan. 29, 1878Auto racing pioneer drove cars built by Henry Ford; first man to drive car a mile per minute (1903).Died: Oct. 4, 1946

Herb Elliott

Born: Feb. 25, 1938Australian runner undefeated from 1958-60; ran 17 sub-4:00 miles; 3 world records; won gold medal in 1500 meters at 1960 Olympics; retired at age 22.

Alan Webb

Born: Jan. 13, 1983Track on May 27, 2001 at the Prefontaine Classic, he ran a mile in 3:53.43 to break Jim Ryun's 36-year-old national high school record; collegiate track star at Michigan.

The Longest Mountain Range

The Question: What is the longest mountain range in the world? The Answer: The Andes Mountains, which stretch more than 5000 miles through…