As we have already told you that without a sky view, the discovery wasn’t visible. So, the team sent the drone above the site which was sending them the live feed of the site. One team was spotting the location and the other team was checking the spot the first team told them to check. They collected samples from that location and then moved to another location to collect more samples which they kept sending to the lab for the tests. They wanted to know how old the discovery was. Which would then tell them about the period it belonged to.