There's a popular new subreddit over at Reddit that's all about dumbing it down. ExplainLikeImFive is a gathering place for interesting questions and simple and patient answers. It has blazed onto the Reddit scene, attracting more than 22,000 readers in the first 13 hours (when this post was written).

There are already a bunch of great questions, and here are a few of my favorites so far. A quick warning: some of the language on Reddit can tend toward the salty variety. If f-bombs disturb your sensibilities, you might want to pass on these.

Explain how people who have solar cells or wind farms can "put back" energy into the power grid, LI5.

Why does the produce of two negative numbers equal a positive number? Can you explain it like I'm five? (shared here because the answer is so good)

What are they trying to accomplish at the LHC? How will this help humankind? (LHC = Large Hadron Collider)

What is this whole Monsanto thing about?

[kinda old] What was Carmageddon?

How did we go from binary to assembly language to programming languages? (shared because I am a big geek)

I'm going to keep my eye on this subreddit for greener Q&As and will share them when the mood strikes.

/AskScience is another excellent subreddit for the inquisitive reader.

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