Finnish energy company Helen said Tuesday it had closed the country's last active coal-fired power plant, ushering in "the ...

Kilometers above the Earth’s surface, the ozone layer protects humanity and all life from the sun’s harmful ultraviolet rays. But in the troposphere, at ground level, this gas can wreak havoc on ...

Lee John Whittington, a philosopher who studied luck, didn’t think “unluckiness” was a quality people had. Then he met his ...