0126 Hoodies

Atomic bomb explosion. Mushroom cloud produced by the detonation of XX-10 Priscilla, a 37-kiloton atomic bomb, on 24 June 1957. This was part of Operation Plumbbob at the Nevada Proving Grounds, USA. XX-10 Priscilla was suspended from a balloon about 200 metres above the Nevada desert before detonation. Atomic or nuclear bombs work by releasing the energy within the nucleus of atoms. Fission bombs contain enriched uranium or plutonium. When an atom absorbs a neutron, it splits into smaller atoms, releasing energy (in the form of heat and radiation) and more neutrons, which propagate a chain reaction.

Saturn. Computer-enhanced Voyager 2 image of the planet Saturn. Two of its moons are seen at upper left. Saturn is a gas giant planet composed mainly of hydrogen and helium. Traces of gases such as ammonia and methane are also present. Its ring system is mostly made up of millions of orbiting chunks of ice. It is the second largest planet in the solar system (behind Jupiter), and has a diameter of around 120,000 kilometres. It is around 95 times heavier than Earth. This image was taken from a distance of 43 million kilometres on 12th July 1981.

Micro-syringe machine with red blood cells in the body, conceptual computer artwork. Microscopic machines such as these may be used in the future to inject drugs at particular sites, or to obtain samples for tests. Red blood cells (erythrocytes) transport oxygen from the lungs to body tissues, fuelling the metabolism of body cells. They also transport carbon dioxide (a gaseous product of respiration) back to the lungs for exhalation. The gases are bound by haemoglobin, a pigmented protein that is contained in the red blood cells. There are trillions of red blood cells in the blood. They last for about 120 days and are each around 7 micrometres across.