How can 40 Eridani B be so much hotter than Betelgeuse, but also much less bright?

What advantages does a pedigree have over a written passage?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land

What was the impact of the concordat of worms?