Design a Mars Parachute

Is the search for extraterrestrial intelligence pseudoscience, protoscience, or science?

Simple life may exist throughout the universe, says paleontologist Peter Ward, but complex life is likely another story.

It’s not easy to look for alien intelligence, but scientists like Seth Shostak believe that’s no reason not to try.

The head of the Cassini Mission says Saturn’s moon Enceladus is the go-to place in the solar system for finding life.

What are the odds that smart aliens exist in the universe?

With new tools, scientists are striving to better grasp our star and its potentially widely destructive solar storms.

Learn how to find signs of extraterrestrial life in our galaxy without leaving home.

Scientists are on the verge of answering one of the greatest questions in history: Are we alone?

Forensic investigators reconstruct the final moments of the Air France disaster.

The shock wave from a supernova may have triggered the formation of our sun and planets five billion years ago.

Explore the planets, visit the moon, and gaze at the stars in this 3-D interactive model of the solar system.

See classic images from Projects Mercury, Gemini, and Apollo as well as space-suit prototypes that never made the cut.

What are lift and drag? And how do they work?

Immense optical and radio telescopes now in the works promise to make astonishing discoveries about the cosmos.

See what some outraged but loving kids had to say to astrophysicist Neil deGrasse Tyson about "demoting" Pluto.

Galileo’s early uses for the telescope weren’t so scientific, says historian of science Jim Bennett.

Aviation safety expert Bill Voss thinks airlines should change the way they train pilots.

An aviation safety expert and a veteran airline pilot weigh in on the effects of lightning strikes during flight.

NASA engineer Dean Alhorn says that some future spacecraft may be propelled by the sun’s rays.

NASA psychologist Al Holland says that a three-year return trip to Mars would be a mental challenge for any astronaut.