What is the Lacemops of Vietnam

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

Which two following best identify the central themes of this speech in the passage the man in the arena

What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?