But because earth is home to the only technological civilization thus known, we are severely hamstrung when making assumptions about the longevity of potential extraterrestrial civilizations.
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They are named super-Earths because they are more massive than the Earth but less massive than Uranus and Neptune (which are about 15 Earth masses).
But because these particles are electrically charged, they also interact with the Earth's magnetic field.
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But because they are film cameras, engineers have to wait until the shuttle returns to Earth to view the images.
Budget puritans rebelled last month not for the devilry of it but because they wanted Mr Hastert to explain what on earth his budget strategy was: how does he plan to keep spending down?
But now, countries are exploring the moon because they believe it can be exploited and used to support the Earth's development.
Cooke says Earth was pelted by meteoroids at about the same time, but they hit the moon because it has no atmosphere to protect it.
But I ask because I am merely wondering whether we sometimes forget a grim reality of the story of life on Earth - that extinction has always been with us.
But I had the luckiest place on earth, the Fifth Avenue of real estate on that boat, because my bunk was in a corner, with a foot and half of space between me and the wall.
Ocean hits are worse than land hits, not just because of immense tidal waves, but because of the vast quantities of super-heated water vapor and dust that spread from the impact to shroud the entire Earth.
But Blue Earth County District Judge Krista Jass wrote that because she had already found insufficient evidence of any harm to the family, their right to privacy outweighed the rights of the media to see the material.
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