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The construction of wormholes and warp drive would require a very unusual form of energy. Unfortunately, the same laws of physics that allow the existence of this negative energy also appear to limit its behavior
Today we take for granted that Homo sapiens is the only hominid on Earth. Yet for at least four million years many hominid species shared the planet. What makes us different?
The synthesis of element 114 confirmed decadesold theoretical predictions of a little patch of nuclear stability in a sea of shortlived superheavy nuclei
The Inductrack promises a safer, cheaper system for magnetically levitating trains. The same technology can also be used to launch rockets
Women and men in many countries still lack adequate access to contraceptives. Unless they are given the option of controlling their fertility, severe environmental and health problems loom in the coming century throughout large parts of the world
Ice entombed our planet hundreds of millions of years ago, and complex animals evolved in the greenhouse heat wave that followed
Although people with the disorder do not fall face-first into their soup as in the movies, narcolepsy is still a mysterious disease. But science has new leads
Explanations of the science underlying the world's most prestigious awards for physics, chemistry and physiology plus a look at the prizes for peace, won by a physicians organization, and economics