The holly, jolly, best time of the year got a light-filled launch on Wednesday, when the towering Christmas tree at Rockefeller Center was officially turned on. The 79-foot Norway spruce, covered with ...
Physicists 3D-printed an ice Christmas tree using only water and a vacuum, but no refrigeration. Time-lapse shows it printing, then melting when the pump stops. (Nanowerk News) The secret of the tree ...