he Discovered the cork cell between year 1 and 2010
John Dalton was 78 years old when he died.
According to AAAS, there were 5.8 million science and engineering researchers in 2006. Look up (Link Moved). Their source is OECD, which might have later data.
Scientists communicate their results to gather information or see who got the best answer. Other scientists can review and attempt to replicate the results.