Explain the relationship between the last ice age and different cultural patterns in northern and southern united states using multiple causation

Name one type of data that h-r diagrams do not show.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic