The stunning meteorological phenomena of lenticular clouds (Altocumuluslenticularis) is a rare spectacle. Looking more like UFO’s than clouds, they are created by three conditions: warm and moist air, winds with constant height and something big, like a tall mountain. When a current of air hits an obstacle in its way, it begins to travel upwards and starts to condense forming a lens-shaped cloud with multiple layers.
Most of your body is younger than you are. The cells on the topmost layer of your skin are around two weeks old, and soon to die. Your oldest red blood cells are around four months old. Your liver’s cells will live for around 10 to 17 months old before being replaced. All across your organs, cells are being produced and destroyed. They have an expiry date.