1) NIST-F2 Cesium Fountain ClockThe NIST-F2, managed by the National Institute of Standards and Technology in the United States, ranks among the most precise primary frequency standards ever construct...

The 10 Hardest Tunnels and Engineering Works Ever ExcavatedTunneling is among the most demanding forms of civil engineering. Whether cutting through unstable geology, burrowing beneath oceans, or carv...

1. Penicillin: The Antibiotic That Changed the Course of HistoryPenicillin, uncovered by Alexander Fleming in 1928 and refined for medical application during the 1940s, signaled the dawn of the antibi...

1. The Telegraph and Early Digital SignalingThe conceptual roots of the internet trace back to the 19th-century telegraph. By converting language into electrical pulses transmitted over wires, the tel...