I had left a partial bottle of water in my car during the deep freeze. When I found it I noticed these shapes that appear to be elongated bubbles throughout the frozen water. I have no idea why the water froze like this, but I liked the interesting pattern made through the freezing process. By all means have a look at this large to see more detail.
I agree with Hope, it definitely looks like a feather. So interesting to see those bubbles but absolutely no idea why they should have formed like that I'm afraid! @mzzhope
When I finished my first year, I took some time off...I know a few of the ones that we following me had the same thing happen when I came back...not sure what happened, but glad you are again! thanks!!!