Wednesday, May 26, 2010

QUESTION: Animals

What animal was regularly used as a warning system in coal mines until 1987?

4 comments:

Mom said...

I just saw a show on this......however.......I don't remember....so I will say moles

Virginia Morgese said...

canary

Matt said...

a canary... preferably yellow.

velochimp said...

a Canary.