At the end of the paleozoic era, there was a mass extinction that wiped out over 90% of all species. what was the possible cause of this mass extinction and why did it cause so many organisms to become extinct?

Slam, judaism, and christianity have shared historical origins. select the best answer from the choices provided. t f

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Uncle tom's cabin started out as a series of articles printed in the national era, a newspaper.