A climate-controlled room at the Minnesota Landscape Arboretum holds thousands of rare books documenting a half-millennia of natural history. However, Andersen Horticultural Library visitors might ...

Erwin Sattler’s Mechanica kits offer experienced horologists a rewarding challenge with their intricate pendulum clock mechanisms. In addition to these brands, institutions like the British ...

He also recalled the clock stopping a few times during his tenure. "The pendulum snapped once, so I made a new spring out of an old saw and machined it in my workshop. "I think I charged the ...

The ion trap of the new In+/Yb+-crystal clock in its vacuum chamber. The Ions are trapped in the gap that can be seen in the middle of the picture between the gold electrodes (target). A shown-up ...

Winter is winding down as the sun is setting later each day, but nothing says spring like the day we spring the clocks forward. Under the current daylight saving period, most Americans will lose ...