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Martin McGrady (April 20, 1946, in Akron, Ohio – April 29, 2006) [1] was an American track and field athlete known primarily for running the now obsolete indoor 600 yard dash. Before Eamonn Coghlan , McGrady held the title of "Chairman of the Boards."
An adult human foot is about 28 cm (11 in) long. The decimetre ( SI symbol: dm ) is a unit of length in the metric system equal to 10 −1 metres ( 1 / 10 m = 0.1 m ). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).
Mark Lehner and NOVA organized an experiment to tow stones and to build a pyramid 9 meters wide by 9 meters deep by 6 meters high. They were able to tow a 2-ton block on a sledge across wood tracks with 12 to 20 men. This effort used 6 to 10 men per ton. The pyramid was 54 cubic meters total estimated weight 135 tons. It was built out of 186 ...
February 6, 2025 at 5:30 AM A 1.4-million-year-old fossil jaw discovered in a South African cave in 1949 has now been identified as that of a previously unknown human relative species dubbed the ...
The object that struck the moon is estimated to have been about 15 miles (25 km) in diameter, larger than the asteroid that struck Earth 66 million years ago and doomed the dinosaurs.
February 4, 2025 at 5:31 PM A large asteroid is headed towards Earth – and could collide with us in just a few years. Known as Asteroid 2024 YR4, the nearly 200-foot space rock could hit just ...
The Tibetan plateau has an average elevation of 4,000 meters (13,000 ft) above sea level and covers more than 2.5 million km 2; it is the highest and largest plateau in the world. In 1990, it was estimated that 4,594,188 Tibetans live on the plateau, with 53% living at an altitude over 3,500 meters (11,500 ft).
Its ilium, the top bone of the pelvis, is also larger than any other, measuring 1.31 m in length. [4] The forearm is longer than any previously known from a titanosaur, and it is only shorter than the long forearms of brachiosaurids, which had a more inclined body posture. [4] Only Paralititan [19] preserves a longer humerus (upper arm