There is no evidence so far that life exists on Mars - or that it ever existed there. Of course, it may have existed - more research is required to be sure.
No. There is proof that they existed over 400 years ago and that they are disbanded.
The Ghana Empire existed between 400 and 1200. It was located in what is now western Mali and southeastern Mauritania.
400 years
the life span of a banyan tree is 500 to 1000 years
Life was different 400 to 500 years ago. There weren't televisions, there were no phones. Food had to be caught, not bought at a store.
A eucalyptus tree have an average life span of 400 years
400-500 years now for 2009 duby duby doo wap Phineas and ferb = Candice and perr y
400 km/h
well about 400 ft in perimeter
France, obviously, although the city of Québec, in what is today Canada, has existed for over 400 years and has had French as the official language ever since.
400 years
Earth is the only place known to harbor life. However, scientists have estimated that there are between 100 and 400 billion planets in the galaxy orbiting other stars. Some of these could potentially harbor life, but it would be difficult to find evidence of life since we can never go to them. Some scientists suspect life might exist beneath the surfaces of Europa and Enceladus, icy moons orbiting Jupiter and Saturn and that life may have once existed on Mars, but again there is no direct evidence.