And so it would keep peace on Earth.

For each two armed ships it sent, one was kept on Earth.

On the other hand, fear - he was honest enough to admit that - united with love of his family to keep him on Earth.

This last summer, there had never even been an explanation forthcoming, just a simple change in orders, keeping him on Earth yet again.

A control group of developing eggs was kept on Earth for comparison.

Other functions is keeping the peace on Earth and other worlds.

Or other family ties to keep you on Earth?

Each box was really a representation of the real box she kept at home on Earth.

Some eggs were kept on Earth as experimental controls to ensure a fair test.

Sure, they've kept enclaves of nature on Earth, and you had the luck to grow up in one.