This is a human-made abstraction to help us better understand natural phenomenon.

Just that there has always been end-of-the-world scenarios, but not all human-made.

This famine is a shocking example of an entirely human-made crisis.

This process is similar to how human-made artificial neural networks on computers work.

Basically, land-based aquatic environments, whether natural or human-made, Ms Sage said.

Perhaps, someday, human-made robots would cross the incredible expanse for a closer look.

But the flesh-and-blood computer has more data than the human-made one.

It is a human-made base, hidden from sight, and it will have defenses.

The cogs around us, both natural and human-made, turn regardless of our interest or input.

A nuclear reactor core is one of the most extreme human-made environments on the planet.

Astronauts' tools and dead satellites are among millions of pieces of human-made trash in orbit.

With a human-made puzzle, when you answer the challenge, you know you have a perfect solution.

Once in a while we'd settle there for a day, to be among our human-made brethren.

Then there are the human-made laws and systems.

Paradoxical as it sounds, desert dust helps to keep human-made pollution down, a new study shows.

Industrial, human-made tartaric acid does nothing like that.