Happy Quaternions Day

"Here as he walked by [in Dublin] on the 16th of October 1843 Sir William Rowan Hamilton in a flash of genius discovered the fundamental formula for quaternion multiplication i² = j² = k² = ijk = -1 & cut it on a stone of this bridge."

It's the 175th anniversary.

Moose Fight

For Moose Friday, from CBC New Brunswick, a video of two male moose battling it out.