A new study found that cities across the U.S. are sinking as groundwater withdrawal causes the earth’s surface to undergo subsidence. The unevenly sinking soils can cause damage to infrastructure and buildings and increase the threat of flooding, and the authors warn that the subsidence is likely ongoing in 20% of all urban areas, impacting 34 million people.

A more active severe weather pattern is ahead beginning later this week in the Plains and Midwest that could produce large hail, wind damage and possibly a tornado threat.

Localized heavy rainfall could result in flooding from Florida to the mid-Atlantic early this week.

Apple snails are an invasive species generally banned from import and movement across state lines. Watch this video to learn about the environmental destruction they can cause, the potentially deadly risk to humans and why wildlife officials in southern states like Texas, Georgia, North Carolina and Louisiana want you to look out for the snails’ bright pink eggs.

During the Apollo missions, NASA put reflectors on the moon. In the five decades since then, scientists have shot laser beams at the reflectors to figure out how long it takes light to come back to Earth. That led to a huge revelation: The Earth and moon are drifting apart. Watch this video to learn how fast that’s happening and what it means for our planet.