'Unmeltable' snowballs explained
Johanna Wagstaffe answers your questions in Science Smart, a weekly video column
We've seen a lot of snow over the last few weeks in both the U.S. and Canada. But snow that doesn't melt when held to a blowtorch or lighter? Videos of this strange phenomenon went viral last week.
However, as Johanna Wagstaffe explains in this week's Science Smart, there's a perfectly reasonable explanation.
If you have a science question you'd like answered, send Johanna Wagstaffe a tweet (@JWagstaffe) or an email to Johanna.Wagstaffe@CBC.ca.