What was the approximate life expectancy for the average European living in medieval times? Why was it higher than those living in the Roman Empire?

Yo i need a catchy title for an article about the importance of the fourth amendment

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

What industry was exempt from the child-labor laws passed in the factory act of 1833?