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• When we harness tidal energy from the moon, what energy source is depleted?

  Asked by ben | 35 responses

• How old are the carbon atoms in our bodies?

  Asked by mattbrowne | 12 responses

• What do bacteria and supernova explosions have in common?

  Asked by mattbrowne | 7 responses

• Why do planets orbit the way they do?

  Asked by pallen123 | 19 responses

• How would a 'non scientist' propose a hypothesis in such a way that it would be considered and tested by scientists?

  Asked by Afos22 | 9 responses

• Could you kill an ordinary black hole by feeding it antimatter?

  Asked by ETpro | 12 responses

• Astrophysics question: Are zero braking distance collisions and infinitive forces possible?

  Asked by mattbrowne | 20 responses

• Cosmos is coming back. Were you a fan? Will you be this time?

  Asked by ETpro | 39 responses

• How can we tap the energy of the oncoming solar storm forecasted around 2012?

  Asked by krrazypassions | 10 responses

• Can a black hole overeat?

  Asked by ETpro | 13 responses

• What do you think Dark Matter really is-?

  Asked by mazingerz88 | 22 responses

• Is laser light unnatural?

  Asked by GeorgeGee | 12 responses

• How do we know that all we see is real?

  Asked by Christian95 | 56 responses

• How do we know the universe is infinite?

  Asked by The_Compassionate_Heretic from iPhone | 37 responses

• Where did the Moon come from?

  Asked by ETpro | 38 responses

• Is space the final frontier?

  Asked by Ltryptophan from iPhone | 16 responses

• How do astronauts pee in zero gravity?

  Asked by Christian95 | 17 responses

• Looking for that planet you misplaced?

  Asked by ETpro | 11 responses

• Why E=mc2?

  Asked by Christian95 | 30 responses

• What if two Blackholes came into contact?

  Asked by xxporkxsodaxx | 17 responses

• How far does the moon travel in a year?

  Asked by GeorgeGee | 16 responses

• Sand vs stars (& how is this quantifiable)?

  Asked by everephebe | 10 responses

• How close together can two stars coexist?

  Asked by Ltryptophan from iPhone | 12 responses

• Why aren't there any really big stars?

  Asked by GeorgeGee | 16 responses

• Is the destruction of all humanity still possible without nuclear wars, a dead Sun and planet killing asteroids?

  Asked by mazingerz88 | 35 responses

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