Touchdown: The European Space Agency successfully landed its Philae robotic probe on a comet 310-million miles from earth. It’s an historic first landing of a man-made craft on a comet. It wasn’t all smooth. The lander hit hard and bounced …

Out of the China Closet: The US and China reached a deal to set new goals for cutting carbon emissions, including a landmark agreement by China to stop its emissions from growing by 2030. China and the US are the …