If someone with HIV is diagnosed with one of these opportunistic infections (even if the CD4 count is above 200), he or she is said to have AIDS. AIDS usually takes time to develop from the time a person acquires HIV--usually between 2 to 10 years or more.
It has been thought that the wheel was invented in 8000 B.C but the oldest discovered wheel dates back to 3500 B.c. It was discovered in Mesopotamia (nowadays in Iraq). Below are the timelines of wheels and its usage in different era.
It is unbelievable to visualize the globe with no wheels around. As soon as the wheel was invented, there was a revolt in the manufacturing industry. The first inventor of the wheel is yet not known to anybody in the world. The first ever wheel was discovered around 3,000 years ago.However, the fact is that it is still anonymous that in which year the wheel was actually invented. The weavers and potters were the first ones to use wheels.The field of pottery is a crucial discovery for progression of humanity.t is unbelievable to visualize the globe with no wheels around. As soon as the wheel was invented, there was a revolt in the manufacturing industry. The first inventor of the wheel is yet not known to anybody in the world. The first ever wheel was discovered around 3,000 years ago.