The ancient Greeks used simple observations of the Sun to prove the Earth’s roundness and size over 2,000 years ago. But did you ever wonder why planets are round or how do they hold their shape? Gravity causes planets to be round. Gravity pulls equally from all sides of a planet. Like the spokes of […]
An astronaut is a person who has been trained, equipped, and deployed as a commander or crew member aboard a spacecraft by a human spaceflight program. Although the phrase is typically reserved for professional space travelers, it is occasionally applied to anybody who journeys into space, including scientists, politicians, journalists, and tourists. But do you
The Golden Gate Bridge is a suspension bridge that spans the Golden Gate, a one-mile-wide strait that connects San Francisco Bay and the Pacific Ocean. The structure connects San Francisco, California, the northern tip of the San Francisco Peninsula, to Marin County, carrying both US The strait is crossed by Route 101 and California State
When identical twin brothers Scott and Mark Kelly were children, their mother reportedly found it so difficult to tell them apart that she once drew a mustache on Mark’s face to be sure. But do you know that Scott Kelly gained a few inches after going into space? Astronaut Scott Kelly returned from space two
Mars has two moons: Phobos and Deimos. American astronomer Asaph Hall was discovered in August 1877 and named after the Greek mythological twin characters Phobos (fear and panic) and Deimos (terror and dread). They accompanied their father, Ares, into battle. The Romans called Ares, the god of war, Mars. But do you know fast Phobos
The Washington Monument is an obelisk-shaped structure on the National Mall in Washington, DC, designed to memorialize George Washington, the first President of the United States and commander-in-chief of the Continental Army during the American Revolutionary War. But why is there a tiny aluminum pyramid on the top of the Washington Monument? The Washington Monument
Our universe is so vast that it appears that nothing exists outside of it. Experts suspect that our universe may be contained within a fourth-dimensional black hole. Our universe began as a singularity, a point in space that was infinitely hot and dense. The scientific community describes black holes in the same way. But did
There is a Cosmological Model That Says Our Observable Universe is Inside a Black Hole Read More »
Norio Ohga, a former opera singer who moved into consumer electronics and helped shape the development of the compact disc, rose to become chairman and CEO of Sony Corporation. But did you know why Sony hired him? Sony’s founder hired an outspoken critic of their products in order to improve them. He became Sony’s president
Bridges are among the most remarkable engineering feats in history, and in rare cases, they have unexpectedly and catastrophically failed due to structural deficiencies, weather conditions, or too much weight. Buy did you know what happened on the Yarmouth Bridge in 1845? In 1845, 79 people were killed when a bridge collapsed as a large
The most common type is the ratcheting socket wrench, also known as a ratchet. A ratchet has a reversible ratcheting mechanism that allows the user to pivot the tool back and forth to turn its socket rather than remove and reposition a wrench. But did you know that a teenager invented this tool? Peter Roberts,
