Actually, Atlantis would be an incredible place if it had Triremes in 10,000 BC. Plato said there were Triremes in the harbour. To keep believing in Atlantis, one has to start distorting what Plato said. To have Triremes in the harbor at that date, you must realize that there would have had to be a history of ship building way before that, for them to have advanced to the Trireme stage. There is no evidence for such ships.
I dare say that Australia was attached to the mainland some 30,000 years ago. The ocean didn't rise over night, so I'm thinking that as the people saw the waters rising more and more, they devised ways and means to get to the Australian portion as the water rose. Necessity is the mother of invention - if it was necessary to travel back and forth it's logical they would devise a method to do so, and then improvements would be made to that method, so it does not surprise me to know they had a crude type of floating vessel. But they certainly didn't have Triremes. I personally think that the Egyptians sailed to Australia but that's another subject and it's under debate!!
Chariots may have been easy to make, but it's the hub that was the difficulty as well as the wheel.
The chariot
History
Chariots seem to have originated in Mesopotamia in the third millennium BCE. The highly mobile two-wheeled war chariot carrying a driver and an archer armed with a short compound bow revolutionized military tactics after 1700 BCE. This expensive weapon spread throughout the Middle East and is thought to have reached Egypt with the Hyksos who took over Lower Egypt, though there is no factual evidence to support this view. It spread into Asia Minor, Greece and was known in Northern Europe by 1500 BCE. With the advent of cavalry riding on horseback it lost most of its military importance by 1000 BCE.
The Egyptian chariot betrayed its Asiatic origin in a number of ways, by the names of its parts which were Semitic and by its decorations which often took the form of date palm branches or animals opposing each other, both Syrian motifs.
Design
The Egyptians improved the design of the chariot by making it lighter, changing the position of the chariot's axle so that the driver would stand closer to it and covering parts of the axle with metal in order to reduce the friction between it and the wooden wheelhub. Some wooden parts were strengthened by covering them with metal sleeves. These changes lightened the load on the horses and greatly improved their performance.
Saddle-pads were placed on the horses' backs and the yoke was attached to them. Leather girths around the horses' chests and bellies prevented them from slipping. A single shaft attached to the yoke pulled the chariots.
The chariot was built of pieces of wood which had been bent into the required shape by heating them (immersing them in boiling hot water for several hours is not recorded but may well have been used), bending them and then letting them dry. Various kinds of wood were used, some of which had to be imported: elm, ash for the axles and sycamore for the footboard.
http://reshafim.org.il/ad/egypt/timelines/topics/chariot.htmI researched this subject once before and I think the oldest remains of any chariot or wheeled vehicle was 5000 years old. There's nothing in the ancient writings about them before that either.
Land masses weren't bigger in the ice age, but perhaps you're thinking they were more accessible due to the ice joining them together or making them appear closer together?
