Much of the U.S. uses single-stream recycling, where plastic, glass and paper go into one bin. Here’s what happens to that material and ways engineering is trying to improve the process ...

(FOX40.COM) — Just about every plastic milk jug has a circular indent placed on its side, but why? Is it just decoration? Does it help determine if the dairy product is expired? Some people may ...

(KTXL) – Just about every plastic milk jug has a circular indent on its side, but why? Is it just decoration? Does it help determine expiration? Some people may not have ever noticed it.