Add Yahoo as a preferred source to see more of our stories on Google. The fossilized tail bones of an Ichthyosaurus, around 190 million years old and weighing 800 kilograms. - Markus Scholz/picture ...

It is no secret that humans are the dominant species on Earth. And with no confirmed evidence of intelligent life elsewhere in the universe, we often assume we are also the most advanced civilization ...

The universe is vast, ancient, and mostly silent. For decades, scientists have pointed their telescopes toward distant stars, ...

The hunt for aliens goes hand in hand with the hunt for habitable planets. Astronomers are on the hunt for exoplanets with atmospheric chemicals that could be a sign of an advanced civilization. These ...

Add Yahoo as a preferred source to see more of our stories on Google. Collage of a telescope under a starry sky and a planet in space. Earthlings, brace yourselves: the galaxy may be emptier than your ...

Suppose an alien civilization discovers Earth and decides to investigate. Before it chooses a landing site or considers how ...

What if the pyramids of ancient Egypt were not just tombs?The massive structures built in the desert were actually spaceships from an extraterrestrial civilization, housing cities that have continued ...

This article predates Brown Brothers Media’s ownership of Science Blog and has not been reviewed under our current editorial process. It is preserved as part of the publication’s archive. After ...

Earth's average global temperatures have been steadily increasing since the Industrial Revolution. According to the National Oceanic and Atmospheric Agency (NOAA), Earth has been heating up at a rate ...

When we imagine what a 'highly advanced civilization' might be like, many people probably picture a civilization that expands outward, such as traveling to other stars or colonizing other planets.

At its peak, the ancient Indus River Valley civilization featured gridded streets, multistory brick homes, flush toilets and bustling shops. Its people traded gold, precious stones and items such as ...

(CNN) — When astrobiologist Adam Frank walked into the office of NASA scientist Gavin Schmidt, he had what he believed was the weirdest question: do aliens experience climate change? It took just ...