Tunguska

On this day 110 years ago, a small asteroid exploded over Tunguska, Siberia, leveling a huge expanse of fotest.

Earth is still vulnerable to such disasters.

Defining Life

Some theoretical physicists are arguing we need a broader definition of life to underrpin our search for ET.

They suggest, for example, that artificial intelligence could be considered a life form.

JWST

NASA is delaying launch of the James Webb Space Telescope until at least 2021.

It's the latest in a series of costly delays for the project.

Moving Stars

A new paper suggests it may be possible for an advanced civilizations could move stars to desired positions.

The paper suggests that might happen in 100 billion years to counter universal expansion.

Intermediate Black Hole

Astronomers have found an intermediate-sized black hole gobbling up a star.

For whatever reason, intermediate black holes are rare.

Blue Origin

Blue Origin says it will start selling tickets to suborbital flights next year.

So far. BO hasn't flown any humans.

Awesome Eruptions

A new study suggests some of the biggest volcanic eruptions in the history of the Solar System happened on Mars over a period of 500 million years, ending about 3 billion years ago.

Such a period would have completely reshaped the planet.