Ever since the first cave paintings, human beings have had a desire to decorate our homes with pictures. These pictures tell a story. In the cave paintings, we see people hunting animals like mammoths and gazelles. Were the paintings meant to commemorate a particularly successful hunt? Were they illustrations for teaching purposes? Chances are, we’ll …
They say a picture is worth a thousand words. Indeed, pictures tell the story of our lives. We use them to commemorate our weddings, our vacations, our births, and other major life events. Then we hang them up all over our homes to remind ourselves of our best times. Regardless of who you are, it’s …
Photographs are an essential memento of special times. They don’t just help you remember; they literally preserve your memories forever. Photos of family, of vacations, of a barbecue with friends, all help to keep us sane and happy. But with the coming of social media, photos are so much more than that. Now, you can …
If you’ve ever worked in a hospital or a mechanic’s shop, you’ll already be familiar with ultrasonic cleaners. These devices use ultra-fast vibrations to create tiny, fast shockwaves in water or another fluid. These shockwaves propagate faster than the speed of sound; hence the term “ultrasonic”. Since the shockwaves move so fast, they pulverize grease …
From the time of the first cave paintings, human beings have decorated their homes to brighten things up. And the invention of the first cameras have allowed us to remind ourselves of our family and friends. We can even memorialize our favorite experiences. Now that we have cell phones, everyone is carrying cameras everywhere. Go …