Are the two versions of Gondwanaland similar to each other? In your judgement, which is the better version of Gondwanaland?

How long does it take neptune to orbit the sun?

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

How many years is a term in the senate