If an alien is 50 light years away from the Earth, watching Earth through a very strong telescope, when will he be able to see the events that happened today, through his telescope? Why did you choose that date??

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?