Featured Article: How did Nikola Tesla change the way we use energy?
Who made it possible to light up your home at night? Thomas Edison, right? Yes, but without the work of Nikola Tesla, we would be living in a different world. See more »
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The history of physical science explains how some of the major physics concepts were discovered. Check out these articles on the history of physics.
How did Nikola Tesla change the way we use energy?
Who made it possible to light up your home at night? Thomas Edison, right? Yes, but without the work of Nikola Tesla, we would be living in a different world.
See more »A Spaceship for Tomorrow
When the space shuttle was conceived in the 1970's, the dream of engineers was to create a new kind of spacecraft, one that could carry people and cargo into orbit, return to Earth, and then be used again repeatedly.
See more »A Thousand Years of Discovery
Try to imagine what your world would be like if not for the scientific discoveries of the past millennium.
See more »Beyond Rockets
Scientists with the National Aeronautics and Space Administration (NASA) realized a nearly 40-year-old dream in July 1999, when Deep Space 1 (DS-1), the first spacecraft to employ an ion engine as its main propulsion system, made a successful fly-by of an asteroid.
See more »Beyond the Big Bang
Few of us can look into the starry sky on a clear night without experiencing a sense of awe.
See more »Big Waves: Tracking Deadly Tsunamis
Shortly after 7 a.m. on April 1, 1946, the first devastating tsunami waves hit Hilo, Hawaii.
See more »Chemistry in a Tube of Toothpaste
Throughout history, people have used many methods to clean their teeth. Some ancient people chewed on frayed twigs.
See more »Close encounters with Saturn
Descriptions of the international Cassini-Huygens mission to Saturn tend toward superlatives.
See more »Coral Reefs in Peril
An ambitious plan to protect and study the coral reefs of the United States was announced in March 2000 by the U.S.
See more »Exploring the Ocean Abyss
The deep ocean is a world that seems as alien to human beings as a planet in a science-fiction novel.
See more »Exploring the Suburban Solar System
One stormy night near the turn of the millennium, a friend and I were sitting beneath the massive Hale Telescope at Palomar Observatory near San Diego.
See more »Fire from the Sky
Storm clouds begin to build above the high plains of Kansas near the Colorado border.
See more »Found--The Top Quark
March 2, 1995, was a red-letter day for researchers at the Fermi National Accelerator Laboratory near Batavia, Ill., and for their colleagues around the world.
See more »Here Comes the Sun
The year 2000 may bring solar fireworks to Earth, astronomers predicted in 1997. More and more sunspots–dark areas with lower temperatures than the surface around them—began to appear across the face of the sun in 1996.
See more »How the Moon Was Born
The moon has been an object of wonder and the subject of art and poetry since people first kept written records or decorated their caves with paintings.
See more »How the Ocean Affects Climate
Whether the forecast calls for a dry spell, a balmy day, heavy snow, or a hurricane, the ocean has played a major role in it.
See more »How the Ocean Came to Be
Soon after the solar system formed out of a cosmic cloud of gas and dust more than 4.5 billion years ago, Earth was a dry, cratered ball barren of life.
See more »In Search of Other Worlds
Astronomers in the United States reported in March 2000 that they had discovered the smallest planets yet found outside the solar system.
See more »Mysterious Gamma Rays
By early 2000, astronomers had made considerable progress in understanding one of the universe's most puzzling phenomena: gamma-ray bursts.
See more »On the Trail of the Elusive Neutrino
Every second, day and night, hundreds of trillions of invisible particles are zipping through the Earth and everything on it—including you.
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