It helps to put it on a more fathomable scale. Watch to see where Earth's major events would fall on a timeline stretching across the US. Produced by Alex Kuzoian Follow BI Video: On Facebook More ...

Earth Day has its roots in growing concern over pollution in the 1960s, when author Rachel Carson's 1962 book “Silent Spring, ...

It helps to put it on a more fathomable scale. Watch to see where Earth's major events would fall on a timeline stretching across the US. Produced by Alex Kuzoian Follow BI Video: On Twitter More ...