Ellesse Janda welcomes a spring rainbow at Cresswell in Northumberland, United Kingdom on March 17, 2023. (Photo by Ian Sproat/Picture Exclusive)

A severe thunderstorm hits Omaha, Neb., on Wednesday, June 12, 2024. (Photo by Chris Machian/Omaha World-Herald via AP Photo)

A cenote is a natural phenomenon, a sinkhole in the Earth’s surface. The Yucatan Peninsula in Mexico has an estimated 7,000 cenotes because it is primarily made up of porous limestone. For millions of years, rainfall slowly ate away at the limestone and a huge system of underground caves and caverns was formed. Many filled with water from rain or from the underground water table. When the roof of a water filled cave collapses, a cenote is born. The water found in a cenote may be fresh water, salt water, or both. Structurally it may be completely open, like a lake, almost completely closed with just a small opening at the top, or somewhere in between.

Loreen from Sweden performs after winning the 2023 Eurovision Song Contest in Liverpool, Britain on May 14, 2023. (Photo by Phil Noble/Reuters)

A young Afghan vendor waits for customers to buy sheep's heads at a roadside stall at the busy market in Kabul on November 29, 2015. (Photo by Wakil Kohsar/AFP Photo)

A colonly of honey bees swarms one of the traffic lights on 41st Street and Broadway on May 1st, 2024. Bees would frequest the area, even finding residence in the flowerbeds rooftop of WeWork offices at 1460 Broadway in prior seasons. (Photo by Derek French/Rex Features/Shutterstock)

These new virtual stores are built by european mega grocery kings Tesco for their South Korean Home Plus supermarkets. So far virtual shopping has been a hit with customers, according to Technologyreview: “The virtual grocery store has been a hit among more 10,287 customers, with Home Plus reporting a 130 percent increase in online sales”.

Sean Phillips flies through the air as he demonstrates the JetLev water propelled jet pack that is strapped to his back at the Yacht & Brokerage Show on February 17, 2012 in Miami Beach, Florida. (Photo by Joe Raedle/Getty Images)