Alpine pennycress is a charming little plant. Its low-growing rosette of green leaves is topped by leggy stalks bearing clusters of pinkish-white flowers. As they develop, these flowers transform into ...

But the factors that prompted the government to stop making pennies are even truer for the nickel. Pennies cost nearly 5 cents to make – 4 cents more than they’re worth. The nickel’s net loss is ...

Scientists suspect iron meteorites might be able to resist erosion on Mars, which may explain why some appear perched on flat ground rather than embedded in craters. In other cases, a crater may have ...