How to build an igloo

Shot on the first day of summer, this video shows northern Canadian Inuit Adami Sakiagak and Tiisi Qisiiq building an igloo. According to the video's accompanying article in the New York Times, Sakiagak grew up on the tundra and builds igloos to "teach younger generations the disappearing craft":

Mr. Sakiagak got to work, drawing a circle in the snow to mark the igloo's perimeter. A friend, Tiisi Qisiiq, began cutting blocks of snow with a carpenter's crosscut saw. Saws have replaced the walrus tusk knives that the Inuit favored for building igloos a generation ago.

Mr. Sakiagak laid a ring of blocks and trimmed the first few to form a ramp so that he would be building in a continuous spiral. This way, he had only one end block to worry about as the igloo rose around him. The blocks were as sturdy as Styrofoam, but heavier.

He beveled the top edge of the blocks inward so that by the third or fourth row he was laying them at a 45-degree angle to the ground. Now, with the capstone in place, Mr. Sakiagak was effectively entombed.

Be sure to move the video around while you're watching it. It's one of those 360 degree ones.