Most scientists agree that an asteroid collision 65million years ago wiped out the dinosaurs.

What are some of the more interesting ideas being proposed as a defense against an asteroid collision?

Some scientists believe it was also an asteroid collision that wiped out the dinosaurs themselves about 135 million years later.

These groupings of asteroids share similar proper orbital elements, which may indicate a common origin through an asteroid collision some time in the past.

Then we understood about more modern extinctions, caused not by asteroid collisions or other uncontrollables, but by human agency.

Crucially, it did so neither to the sound of wailing and gnashing of teeth, nor the sonic boom of a catastrophic asteroid impact.

Although the asteroid impact caused mass destruction at a regional level, changes to the climate were behind the extinction of the dinosaurs, the researchers believe.

Three potential events were considered as part of the research, including; large asteroid impact, and exploding stars in the form of supernovas or gamma-ray bursts.

The natural risks of the past - asteroid impact, supervolcanic eruption, stellar explosion - were highly unlikely.

It seems very certain the dinosaurs were wiped out over a long period of time, triggered by an asteroid impact.

Unlike space debris, the prospects and challenges of space tourism, moon bases and asteroid mining seem far off, both in terms of technology and investment.

One day, contact was lost suddenly from an asteroid mining station.

Though the asteroid mining has been criticized as too tedious and time-consuming, the battle sequences and graphics have received praise.

Asteroid mining has the potential to provide the world with an unlimited resource of materials, which could eliminate scarcity for those materials.

Asteroid mining will become more viable when fixed costs lower due to development in infrastructure.

Previous calculations suggested the surface of the asteroid might be anywhere from a few million to 200 million years old.

It will land a probe on the surface of the asteroid, a leftover from the formation of the solar system.

Two further images captured scenes of a rugged, barren asteroid surface, including one taken during a hop.

As he makes his way across the craggy asteroid surface, he encounters two monsters in combat.

The surface of the asteroid appears completely covered in ice.