business leader, rear admiral (retired) Chang served in the U.S. Navy for 34 years before retiring in 1990. He became the first Asian American naval officer to reach flag rank. He held a variety of…
astronaut, scientistBorn: April 5, 1950Birthplace: San Jose, Costa Rica Chang-Dìaz moved to the United States when he was in high school, and got a doctorate in applied plasma physics from MIT in…
writerBorn: 1965Birthplace: Appleton, Wisconsin The daughter of Chinese immigrants, Chang left Wisconsin at 18 to attend college at Yale University, where—after trying pre-med and pre-law classes—…
Millions of years from now, Los Angeles will be close to Alaska. Our world is moving constantly, spinning at a rate of 1,000 miles per hour. We are whirling around the sun at 20 miles per second.…
Invented by the Greeks in 400 B.C., catapults were used in ancient and medieval times to hurl stones, spears, and other objects at fortifications.
The crossbow was invented in China but developed…
by Ben Snowden Boris Yeltsin's sudden sacking of prime minister Sergei Stepashin on August 9, 1999, was part of a long series of reorganizations within the Russian government. After his…
Down from the treesFierce, but fluffyOut of the swampNo one has ever seen a living dinosaur, so scientists rely on fossil remains to provide clues to how these ancient reptiles looked and behaved…
SOLID PARTICLESLIQUID PARTICLESGAS PARTICLESSOLAR PLASMAMELTINGBOILINGFIND OUT MOREAll matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from…
Try to imagine life without antibiotics. We wouldn’t live nearly as long as we do without them. Here’s a look at some discoveries that have changed the world. It’s impossible to rank their…
