Lasers Quartz Crystals Higgs Boson Particles Quantum Entanglement 
Answer: Lasers
Since the mid 1950s, when the first atomic clock radically increased the accuracy of timekeeping beyond simply trying to synchronize quartz-crystal clocks to the movement of the Earth around the Sun, there has been a continual drive to refine and improve atomic timekeeping.
For decades atomic clocks relied on the use of microwave radiation to excite electrons and measure the oscillation of electrons in hydrogen-1, cesium-133, and rubidium-87 atoms and many of the atomic clocks around the world still use this reliable and time-proven mechanism. Despite significant improvements to the microwave model over the last sixty years (the microwave-based atomic clocks get better by a factor of ten roughly every decade), they have been surpassed by new technology.
Recent refinements, building on research efforts started back in the 1990s, have yielded an atomic clock that uses cooling and lasers (known as optical-lattice clocks) to increase the precision in which the atoms can be monitored and interacted with. How much more precision? The best optical clocks researchers have created to date are so precise that if run for the entire age of the universe the clock would lose no more than a second.
Hybrid drives are a hybridization of traditional mechanical hard drive technology and more modern solid-state drive technology. The drives combine the large storage capacity of a traditional magnetic hard drive with the speed of a solid-state drive. The drives typically contain a 4-24GB solid-state
We recently showed you how to turn your Raspberry Pi into a 24/7 low-power downloading machine. Now we’re back to show you how to make the system almost completely hands off with awesome automation tools.
Android allows you to create app shortcuts, but you can also create special shortcuts that link directly to screens within an app. For example, shortcuts could link to the Navigation screen in Maps or any screen in the Settings app.
HTTPS, the lock icon in the address bar, an encrypted website connection — it’s known as many things. Knowing what it means is important, as it has serious implications banking online, shopping, and avoiding phishing.
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Opening a Word document as read-only helps prevent unintentional changes you make to the document from being saved. Read-Only mode does not allow you to make any changes to the document, preventing you from inadvertently saving changes. We will show you how to open any Word document as read-only.
We love building our own computers but it takes quite a bit of time. If you love to build but find you don’t have the time, a custom-built PC still gives you control over your components, while leaving the actual assembly up to someone else.
If you have two awesome dual-monitor computers and want to easily switch back and forth between them using a single keyboard and mouse, then what is the best way to go about it? Today’s SuperUser Q&A post provides some great suggestions for a reader’s heavenly hardware setup.
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If you already have a lot of music and home videos in your iTunes library, you can easily stream it all to your Apple TV, and thus whatever output sources to which it is connected.
