Which occurrence would contradict the big bang theory? the percentage of carbon dioxide in earth’s atmosphere increases. scientists discover that 99% of the universe’s mass is hydrogen. a radio telescope detects microwave radiation in space. distant galaxies move progressively farther away from earth.

How did trade contribute to the spread of the plague in the 1300s? trading vessels from the americas brought the plague to london, where it spread across europe. trading caravans from mongolia brought the plague to rome, where it spread across europe. trading caravans from russia brought the plague to barcelona, where it spread across europe. trading vessels from china brought the plague to sicily, where it spread across europe.