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May 2, 2018 at 7:41 comment added Pete Kirkham You are correct that it changes the meaning. I don't know what Hawking believed about it, but many other scientists do believe the development of the planet is due to the gradual effects of life smithsonianmag.com/science-nature/… sciencedirect.com/science/article/pii/S0960982215010908
May 2, 2018 at 0:39 comment added Mazura I hate sentences with two thats. Does this even need one? Stephen Hawking believed the earth is unlikely to be the only planet life has developed on.
May 1, 2018 at 23:01 comment added spacetyper But life has developed our planet...
May 1, 2018 at 18:24 comment added BlueRaja - Danny Pflughoeft @Magoo: I think 'on' is more natural, but either is technically ok
May 1, 2018 at 16:17 comment added Magoo For this construction, I'd say 'upon', not 'on'
May 1, 2018 at 16:03 comment added crizzis @Tᴚoɯɐuo You could explain it with a thought experiment: whenever you use a relative pronoun other than that, try putting that is the answer to the question right before it: earth is unlikely to be the only planet that is the answer to the question where life has developed gradually. The question is, therefore, Where has life developed gradually? Fair enough. Does where has life developed gradually on? make sense? No. There's nothing on could possibly refer to.
May 1, 2018 at 13:30 comment added Darren Ringer Just a warning that some may consider the construction "that <noun> has <verb>-ed on" as being an instance of "ending a sentence with a preposition" (in spite of the adverb at the end in this example), so "that life has developed on [gradually]" could be considered poor style. Then again, Winston Churchill's rebuke goes a long way to point out the error in this proscription. "This is the type of errant pedantry up with which I will not put."
May 1, 2018 at 12:50 comment added TimR +1. But we wouldn't say ...where life has developed on. Not that you're suggesting we do. Just hard to explain.
May 1, 2018 at 10:14 review First posts
May 1, 2018 at 10:59
May 1, 2018 at 10:13 history answered Harrison CC BY-SA 3.0