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Question
What do we mean by "life as we know it"?Answer
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Related questions
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If the inflation theory is correct, the geometry of the universe is flat and Euclidean.
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The critically bound universe, with omega = 1, is saddle shaped.
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If the value of H is doubled, it would also double the age of the universe.
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The cosmological principle is the ultimate extension of the Copernican principle to the entire universe, in that there is no center at all.
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Name each of the factors in the Drake equation.
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Compare the Copernican principle with the assumptions of mediocrity.
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In the habitable zone, surface water must be at least partially ________ in phase.
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Outside our Earth, the most likely places for life are the planet ________ and jovian moon ________.
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Conducted in 1953, the ________ experiments were designed to show what types of complex molecules might have formed in the Earth's primitive environment.
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An extraterrestrial observer would pick up the strongest radio signals when
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Most SETI searches are done at
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In Drake's equation, which of the following is the closest estimate for the number of stars that are formed in the Milky Way Galaxy?
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Which type of molecules, vital to our life, were found to have survived a fiery descent to Earth on meteorites?
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How long ago did multicellular life forms appear in the fossil record?
A) 4.5 billion years ago
B) 3.8 billion years ago
C) one billion years ago
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What important molecules of life did Miller and Urey brew up?
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Thanks to the far-flung Voyager and Pioneers, knowledge of our presence has now spread out over 30 light years.
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The water hole lies between 18 and 21 cm in wavelength in the radio spectrum.
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Around Sun-like stars, we have, to date, only found Jupiter-like planets.
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Of the billions of possible combinations of atoms into organic molecules, only about 1500 actually occur.
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Earth-like planets have been observed outside our solar system orbiting in the habitable zone.
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The one term of the Drake equation whose value remains completely unknown is the average lifetime of a technological civilization.