If you want to make your iPhone easier to use, you can customize its Control Center to gain faster access to the buttons and toggles you rely upon to perform frequent tasks. Plus, you can remove all ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still daring to test it. Some theories of quantum gravity suggest light might ...

Solar physicists say they have found a key source of intense gamma rays unleashed when Earth's nearest star produces its most violent eruptions. In findings published in Nature Astronomy, scientists ...