Synthetic rubber

Another plastic that was critical to the war attempt was "synthetic rubber", which was produced in a range of forms.

The first synthetic rubber polymer was obtained by Lebedev in 1910. Practical imitation rubber grew out of studies published in 1930 written separately by American Wallace Carothers, Russian scientist Lebedev and the German scientist Hermann Staudinger. These studies led in 1931 to one of the first winning synthetic rubbers, known as "neoprene", which was residential at DuPont under the direction of E.K. Bolton. Neoprene is highly unwilling to heat and chemicals such as oil and gasoline, and is used in fuel hoses and as an insulating material in machinery.

Worldwide natural rubber goods were limited and by mid-1942 most of the rubber-producing regions were under Japanese control. Military trucks wanted rubber for tires, and rubber was used in almost every other war machine. The U.S. government launched a major effort to expand and refine synthetic rubber. A principal scientist concerned with the effort was Edward Robbins.

Arthurian legend
Stonehenge is also mentioned within Arthurian legend. Geoffrey of Monmouth said that Merlin the wizard directed its removal from Ireland, where it had been constructed on Mount Killaraus by Giants, who brought the stones from Africa. After it had been rebuilt near Amesbury, Geoffrey further narrates how first Ambrosius Aurelianus, then Uther Pendragon, and finally Constantine III, were buried inside the ring of stones. In many places in his Historia Regum Britanniae Geoffrey mixes British legend and his own imagination; it is intriguing that he connects Ambrosius Aurelianus with this prehistoric monument, seeing how there is place-name evidence to connect Ambrosius with nearby Amesbury.In World Mythology: An Anthology of the Great Myths and Epics by Donna Rosenburg, on pp. 428-30, she summarizes the Stonehenge story of the definitive Arthur legend. By this the reader learns that, according to the legend of King Arthur, the rocks of Stonehenge were paganistic healing rocks from Africa. Giants brought them from Africa to Ireland for their demonic healing properties. The second King of Britain, Aurelius Ambrosias wished to erect a memorial to the nobles who had died in battle with the Saxons. Those nobles were buried near Salisbury. With the help of Merlin, Aurelius made Stonehenge that monument. So the King sent Merlin, Uther Pendragon and 15,000 knights to Ireland to retrieve the rocks. They slew 7,000 Irish. As the knights tried to move the rocks with ropes and force, they failed. Then Merlin whispered witchcraft incantations over the rocks and they became as light as pebbles. Then Stonehenge was dedicated in Britain. Shortly after, Aurelius died and was buried within the Stonehenge monument, or "The Giants' Ring of Stonehenge".

Disk of the Milky
The major disk of the Milky Way Galaxy is about 80,000 to 100,000 light years in diameter, about 250-300 thousand light years in circumference, and outside the Galactic core, about 1,000 light years in thickness. It is calm of 200 to 400 billion stars. As a guide to the relative physical scale of the Milky Way, if the galaxy were reduced to 130 km in diameter, the solar system would be a mere 2 mm in width. The Galactic Halo enlarges out to 250,000 to 400,000 light years in diameter. As detailed in the Structure section below, new discoveries indicate that the disk extends much farther than previously thought.The Milky Way's absolute magnitude, which cannot be measured directly, is assumed by astronomical convention to be -20.5, although other authors give an absolute magnitude of -21.3.