An environmental engineer who mapped microplastic pollution in three of Pennsylvania’s watersheds explains what it means for our health.

Enslaved people were not just enslaved physically, but mentally as well. as widespread laws in the South barred enslaved people from receiving an education.

Electric utilities don’t make money from selling power to customers, but instead profit from investments in power plants, wires, substations and other equipment.

An observatory director describes the differences between the types of rocks that fly through space.