This project combines a sand timer with a rotating mechanism and an optical beam through the center of the timer to observe the falling sand as they create a USB Hourglass. This project combines a ...

Decades-old mathematics might finally explain some features of the 'oddballs' of matter: granular materials that sometimes behave like a solid, and at other times flow like a liquid. Strange as it ...

In the 1930s classic movie “The Wizard of Oz,” The Wicked Witch of the West uses a sand-filled hourglass to gleefully remind our hero Dorothy that she only has so much time to live while the sand is ...

Sand in an hourglass might seem simple and straightforward, but such granular materials are actually tricky to model. From far away, flowing sand resembles a liquid, streaming down the center of an ...

The steady methodical flow of sand through an hourglass as it succumbs to the pull of gravity is a great way to kill time—but not a very productive one. This clever alternative hopes to change that, ...