Saudi Arabia and Russia are discussing two main scenarios for a meeting of OPEC and its oil-producer allies in June and both frameworks propose increased crude output from the second half of 2019, two sources familiar with the matter said. 

Apple unleashed the latest versions of iOS, MacOS, WatchOS and TVOS ahead of its annual developer conference in June, and the new colors expected to be coming to the 2019 iPhones.

Like other biofluids, sweat contains a wealth of information about what's going on inside the body. However, collecting the fluid for analysis, usually by dripping or absorbing it from the skin's surface, can be time-consuming and messy. Now, researchers have developed a bandage-like biosensor that both collects and -- in conjunction with a smart phone -- analyzes sweat. The device could someday help diagnose diseases.

From pop hits to preachers and pretty much everything in-between, the car radio has been a part our lives for almost 100 years

Apple has also unleashed the latest versions of iOS, MacOS, WatchOS and TVOS ahead of its annual developer conference in June.

In Sicily, police are moving to stop criminals stealing the island's pistachios ahead of this year's harvest.

An action-packed day at the Italian Open was marred by an astonishing outburst from Australian Nick Kyrgios, who was expelled from the tournament after going wild in the third set of his match against Casper Ruud on Thursday.

Richard P. Feynman to Frederich Hipp, April 5, 1961

Editor's Note: Frederich Hipp, a high school student, was fascinated by physics ("atomic theory and quantum mechanics in particular") and had built a cloud chamber for his science project. He was concerned, however, that he had little aptitude for math. His question to Feynman: "Can a person of normal mathematical ability master enough math to do work on some professional level in this field?" Mr. Frederich Hipp New Milford, Connecticut Dear Sir: To do any important work in physics a very good mathematical ability and aptitude are required. Some work in applications can be done without this, but it will not be very inspired. If you must satisfy your "personal curiosity concerning the mysteries of nature" what will happen if these mysteries turn out to be laws expressed in mathematical terms (as they do turn out to be)? You cannot understand the physical world in any deep or satisfying way without using mathematical reasoning with facility. How do you know you don't have an aptitude for math? Perhaps you disliked your teacher, or it was presented wrong for your type of mind. What do I advise? Forget it all. Don't be afraid. Do what you get the greatest pleasure from. Is it to build a cloud chamber? Then go on doing things like that. Develop your talents wherever they may lead. Damn the torpedoes—full speed ahead! What about the math? Maybe (1) you might find it interesting later when you need it to design a new apparatus, or (2) you may not go on with your present ambition to understand everything, but instead find yourself a leader in some other direction, such as building the most ingenious rocket-ship control devices, or (3) biological problems may ultimately absorb all your interest and talent for doing experiments and learning about nature, etc. If you have any talent, or any occupation that delights you, do it, and do it to the hilt. Don't ask why, or what difficulties you may get into. If you are an average student in everything and no intellectual pursuit gives you real delight, then I don't know how to advise you. You will have to discuss it with someone else. It is a problem that I have not thought about very hard. Sincerely, R. P. Feynman

Australia's Nick Kyrgios threw his racquet, kicked a bottle and hurled a chair on the court, then forfeited his second-round match at the Italian Open.