Chichén Itzá, Mexico — At the spring and fall equinoxes, the setting sun casts serpent-like shadows along the northern stairs of El Castillo, or “the castle.” Built more than a thousand years ago by ...

During Egypt’s pyramid age, a well-connected man named Wahtye died and was laid to rest in the vast royal cemetery that now occupies the desert west of modern Cairo. His colorfully decorated tomb, ...

The energy sector, particularly oil and gas, is an arena of immense opportunity yet daunting complexity. It has historically offered some of the market’s most compelling returns, often accompanied by ...

Energy stocks appeal to investors for a few different reasons. They tend to perform independently of other types of stocks, so investors buy them to diversify their portfolios. Many energy stocks ...

Renewable energy use in the U.S. has doubled in the past decade, with state-level contributions varying. Some states produce over half their electricity from renewables, targeting 100% clean energy ...

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a calorie-burning cardio boost to what would otherwise be a ...

A drone view shows rotor blades and other parts for the ongoing construction of the Revolution Wind offshore wind turbine farm, staged on the State Pier in New London, Connecticut, U.S., September 23, ...

A majestic row of five circular pyramids known as yácatas dominates a promontory overlooking Lake Pátzcuaro in the western Mexican state of Michoacán. Embodying the former might of the Purépecha ...

Archaeologists working in a tunnel beneath Teotihuacan's Pyramid of the Sun have unearthed two caches of artifacts that may have been meant to consecrate the massive building's construction around a.d ...

Of the many families of solar absorber materials known, only a handful have been shown to convert sunlight into electricity with power conversion efficiencies above 10%. Now, researchers have pushed ...

Water electrolysis powered by renewable energy is a promising technology to produce green hydrogen, but widespread adoption is hindered by the lack of stable, low-cost catalysts coping with the ...