Erin Black

Cornish miners emigrated to the Pachuca-Real del Monte area to find gold and silver in 1824.

Spirit Airlines hasn't had a profitable year since 2019, and it's lost more than $2 billion since 2020. It filed for bankruptcy protection in November.

Cameron Taylor is raising money for Doctors Without Borders with his trek across Vietnam.

Thermal batteries could be the future of energy storage, offering a cost-effective way to store renewable energy and decarbonize heavy industries like steel and cement production. Unlike lithium-ion batteries, they use raw materials like bricks and graphite to store heat, making them cheaper and more scalable. CNBC talked to companies like Rondo Energy and Antora Energy to understand why they're betting big on this technology and how it could transform clean energy.

United Airlines has been trying to expand its profits by investing heavily in roomier seats and growing a network that will excite high-spending travelers.

While airline passengers are flying in record numbers, manufacturing and supply chain problems have persisted post-pandemic. Boeing and Airbus delivery delays have forced some airlines to fly older planes longer to keep up with demand. Demand for old engines, coupled with an engine recall has led to long delays in maintenance shops. American Airlines is increasing the amount of engines its overhauling in-house by 60% compared to last year.

Delta and American Express have put new restrictions on lounge access to avoid overcrowding.

CNBC got a behind-the-scenes look at American Airlines' catering kitchen at Dallas-Fort Worth International Airport.

Diabetes effects 537 million people globally, but there’s been no promising cure. Now, stem cells may finally offer a way to create new insulin-making cells.

The United States lags behind the rest of the world when it comes to passenger trains but when it comes to the freight railroad the U.S. is dominating.