what is this picture conveying, what is the author trying to say? And how does this picture relate to what happening in this period (I think it was the lynching)

It's conveying racism and inequality amonst skin color. During this period slavery was most likely normal or poc were definitely treated differently. The two white men with guns at this time were like most people who were white, putting down pocs since they believed that pocs were mean't to be slaves. Nobody was even trying to help the man who could've been guilty; instead they most likely hung him since he was a poc.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.