Hand Shadows

I've been spending a fair amount of time preparing for a new class I'll be teaching this semester on Environmental Ethics, so I haven't had much time to prepare an intellectually stimulating entry for everyone today.

I do have, however, some aesthetically pleasing videos showing both the creativity of hand shadow artists and the ease with which our minds can create three-dimensional mental representations based on black & white, 2-dimensional surfaces...

And why don't we get a bit environmental too?