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From: Quora Digest <[email protected]> To: [email protected] Subject: Why are there crushed stones alongside rail tracks? - Quora Date: Sun, 06 Dec 2015 04:52:12 +0000 giQuora Top Stories from Your Feed Your Quora Digest Why are there crushed stones alongside rail tracks? David S. Rose, Serial entrepreneur and active angel investor, based in New York av-id 10.7k votes 2 This is a good question with an interesting answer. The crushed stones are what is known as ballast. Their purpose is to hold the wooden cross ties in place, which in turn ... Read More >7, What are the 5 tips of a productive developer? _,_GI Glyn Williams, Grizzled game industry veteran. vn 2.6k votes 2 Jonathan Blow is an impressive developer. It's hard to imagine just how productive he is. He is an independent game developer. To make this sort of project you have to ... Read More » What do taxi drivers know that most people don't? Aaron Alexander, Marketing, copywriting, ex-actor, New s Aa Zealander ro—n 6.6k votes I've never forgotten the advice I got from the taxi driver who took me home from the hospital after my eldest was born: "It's not what you say or do - it's what you are.... Read More » What is the most depressing one liner? Dushka Zapata, Reader. Writer. Introvert. ushk I 2.9k votes We have a saying in Mexico that breaks my heart every time I hear it. It refers to the times when you make yourself vulnerable to getting hurt. EFTA01139528 I he ax asked the tree for i... Read More >> Why do we fall asleep during lectures? Robert Frost, Instructor and Flight Controller at NASA lober 10.4k votes lit John Medina, in his book Brain Rules, introduces data that forms the following graph: The data shows that student attention level takes a dive, approximately io minutes int... Read More » What are the weirdest reasons for which two people have gotten married? Ri Richard White, Saloon Singer, Actor, Stage Director char 640 votes It may not qualify as "weird" today, but - I was serving in the U. S. Army in what was then West Germany in the 1970's. There were two soldiers I knew who married each ot... Read More » What are some of the costliest mistakes ever made in history? „...He Ben Belser 2.1k votes Once upon a time, an unassuming letter arrived on the desk of Napoleon Bonaparte, Emperor of the French and one of history's most likely candidates at taking over the world... Read More >> In Chinese culture how common is it to regularly say "I love you"? Dakota Lim, Entrepreneur, Optimal Health Researcher, akot i Budding Writer - 1k votes Very common to hear parents say "I love you" in the Chinese culture. BUT, these words must be translated. Here is the Chinese to English translation of "I love you": Word... Read More » EFTA01139529 Why can't we just split up the United States? I I Ryan Carlyle, BSChE. Subsea hydraulics engineer an 1.3k votes it Can you see where to divide this blob into a red half and a blue half? It's a map of US counties, colored on a red-purple-blue gradient by 2008 voting results and size-adju... Read More » What's different about directing a superhero movie vs something like The Break Up? Pe Peyton Reed, Director of Ant-Man vton 58 votes There are a lot of similarities between the movies that I've done and Ant- Man. They're comedic, and I like comedies that are visual in nature, where the camera is part oft... Read More » Read More in Your Feed This email was sent by Quora (650 Castro Street #450, Mountain View. CA 94041). Ouora is the best answer to any question. Unsubscribe from this email. EFTA01139530