Scientists are studying a fascinating image of an unusual circular formation on Mars and trying to work out how it got there. Freelance writer Amanda C. Kooser covers gadgets and tech news with a ...

Circular economy may not always be effective or even desirable owing to the spatiotemporal dimensions of environmental risk of materials, and variability of global policies. Circular flows involving ...

Volatility in commodity markets is making it harder to rely on linear supply chains. Lithium prices, for example, rose by more than 1,000 percent between 2020 and late 2022, before dropping 86 percent ...