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

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Is there enough density change in a tree's growth rings that would make Ultrasound a viable method of non-destructively aging a tree?

2762 upvotes

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What would happen if a 15km diameter asteroid had such a close miss of the Earth that it dipped into the atmosphere at say 30km above the surface before continuing back into space.

1 upvotes

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What would happen if a 15km diameter asteroid had such a close miss of the Earth that it dipped into the atmosphere at say 30km above the surface before continuing back into space?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is there enough density change in a tree's growth rings that would make Ultrasound a viable method of non-destructively aging a tree?	2762
What would happen if a 15km diameter asteroid had such a close miss of the Earth that it dipped into the atmosphere at say 30km above the surface before continuing back into space.	1
What would happen if a 15km diameter asteroid had such a close miss of the Earth that it dipped into the atmosphere at say 30km above the surface before continuing back into space?	1