In the beginning, more than 13 billion years ago, the Universe was an undifferentiated soup of three simple, single-atom elements. Stars would not form for another 100 million years. But within 100,000 years of the Big Bang, the very first molecule emerged, an improbable marriage of...

NASA astronaut Christina Koch is going to have her mission on the International Space Station (ISS) extended to nearly 11 months, which would set a record for the longest spaceflight by a woman, the US space agency said Wednesday. Koch, 40, arrived on the ISS on March 14 with two other crew...

Ukrainian President Petro Poroshenko thought he could rely for his re-election in part on the votes of soldiers who have spent years fighting pro-Russian separatists. But a visit to the frontline found low morale and little enthusiasm for him. Such views go some way to explaining why...

Iraqi Prime Minister Adel Abdul-Mahdi has arrived in Saudi Arabia for his first visit since assuming the post six months ago. The Iraqi premier is visiting Saudi Arabia just days after visiting its rival, Iran, earlier this month. He's insisted that Iraq wants good ties with Iran, but also...