What's this red stuff on my maple tree?

Factual Questions
1

The tree is 4-5 years old.

2

Maple Gall.

More: http://learningstore.uwex.edu/pdf/A2691.pdf

3

Thanks. :slight_smile:

4

Be careful with it! If you drop it, it will suck the Earth into a black hole!

5

Thanks, Spock.

6

That’s actually the evil Spock-on-Crystal-Meth from an alternative time line.