/u/BandarSeriBegawan's posts in /r/askscience

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Since plants derive their energy from photosynthesis, from where do they amass matter? Animals put on fat for instance, but how does an oak tree become so large? Where is it getting its physical structure from, without eating?

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If a planet was to collide with Earth at a normal orbit speed (that of Earth's, say) heading straight for us, what would we see from Earth? How fast would the oncoming planet seem to approach?

1 upvotes

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What would you need to avoid instant death on the surface of Mars, barring bad weather?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Since plants derive their energy from photosynthesis, from where do they amass matter? Animals put on fat for instance, but how does an oak tree become so large? Where is it getting its physical structure from, without eating?	2
If a planet was to collide with Earth at a normal orbit speed (that of Earth's, say) heading straight for us, what would we see from Earth? How fast would the oncoming planet seem to approach?	1
What would you need to avoid instant death on the surface of Mars, barring bad weather?	0