ABC News contributor Father James Martin discusses the characteristics that cardinals might be looking for in the next pope.

Rare earth elements are critical to many industries—used in electric motors, medical imaging and diagnostics, oil and gas ...

For the first time, astronomers have probed the physical environment of repeating X-ray outbursts near monster black holes ...

Scientists have discovered the elusive properties hidden within promethium, a rare earth element that has remained largely ...

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