Science Chronicles

EVOLUTION OF WEAPONRY THROUGHOUT HISTORY: *400,000 BC: The earliest evidence of humans using spears, in a part of Germany now near Schöningen. However, one population of modern chimpanzees in Senegal uses spears to hunt   bushbabies , suggesting the technology may have been used by our most primitive ancestors. * 400,000 BC to 25,000 BC: The atlatl, sometimes dubbed the Stone Age Kalashnikov , throws a flexible dart that can kill a deer at 40 metres. Developed in northern Africa, it spreads throughout the world, being later replaced by the bow and arrow. *23,000 BC: Boomerangs are strongly associated with Australia’s Aboriginal people, but were actually used as hunting weapons throughout Europe and Africa. Most boomerangs  do not come back when thrown . The oldest boomerang yet, 23,000 years, was made from a mammoth tusk and discovered in a cave in Poland *1368 to1644: China’s Ming Dynasty drives firearms technology forwards. Developments include the matchlock, which eliminate...

 INVENTIONS THAT CHANGED THE WORLD: ~WHEEL: Before the invention of the wheel in 3500 B.C., humans were severely limited in how much stuff we could transport over land, and how far. The wheel itself wasn't the most difficult part of "inventing the wheel." When it came time to connect a non-moving platform to that rolling cylinder, things got tricky also  the holes at the center of the wheels and the ends of the fixed axles had to be nearly perfectly round and smooth, he said. The size of the axle was also a critical factor, as was its snugness inside the hole (not too tight, but not too loose, either). ~PRINTING PRESS: German inventor Johannes Gutenberg invented the p rinting press  sometime between 1440 and 1450. Key to its development was the hand mold, a new molding technique that enabled the rapid creation of large quantities of metal movable type. Though others before him — including inventors in C hina  and Korea — had developed movable type made from meta...

Today let about mankind's journey to space.it all started in the year 1942,when the German V2 Rocket created by Wernher von Braun ,it reached up to a height of 62 miles from the Earth's surface(boundary of space).Then in 1947  the first animals went into space such as fruit flies.They were used to study the effect of space travel on animals as they were very similar to humans.It wasn't to far off that the first monkey,Albert II was sent into space in a specially adapted V2 Rocket that flew 83 miles from Earth on 1949.In 1957 finally the Russians created Sputnik I the the first satellite with a transmitter implanted in it,which just needed 1 watt to run.It was the size of a human and it spherical part was the size of a beach ball. Then in 1958    Explorer 1 the first satellite launched by the United States,it was built by the Jet Propulsion  Laboratory.Then finally the the first human,a Russian cosmonaut Yuri Gagarin was sent to space on 1961 and o...