The AMECA robot from the manufacturer Engineered Arts is in the Deutsches Museum Nuremberg (Future Museum), Bavaria on May 3, 2022. AMECA is a humanoid robot that will be presented to the general public for the first time in Europe as part of the Blue Night on May 7, 2022 in Nuremberg. (Photo by Daniel Karmann/dpa/Alamy Live News)

Madras Engineers Group (MEG) soldiers perform “Kalaripayattu”, a traditional martial art from Kerala, during celebrations for the India's 74th Republic Day in Bengaluru on January 26, 2023. (Photo by Manjunath Kiran/AFP Photo)

The Millau Viaduct is a cable-stayed bridge that spans the valley of the River Tarn near Millau in southern France. Designed by the French structural engineer Michel Virlogeux and British architect Norman Foster, it is the tallest bridge in the world with one mast's summit at 343.0 metres (1,125 ft) above the base of the structure.

This cable ropeway suspended between cliffs is the only access to Yushan village in Hubei Province, Chin, which has a population of just over 200 people. The ropeway was built in 1997; before that villagers faced a walk of several days to get to the next nearest village. The ropeway, which is powered by a diesel engine, is 1,000 metres long and 400 metres above the valley floor.

Steam enthusiasts demonstrate their engines at the Great Dorset Steam Fair, the biggest event of its kind in Europe on September 2, 2011 in Tarrant Hinton, near Blandford, England. Over 200,000 people are expected to attend the 600 acre event, which is in its 43rd year and includes displays and demonstrations of steam and vintage machinery over five days. (Photo by Matt Cardy/Getty Images)

A three wheeled “cabin” scooter manufactured by German aircraft engineers Messerschmitt & Co at factories in Regensburg. (Photo by Hans Enzwieser/BIPs/Getty Images). 1955

Engineer Mikhail Venin works on an antenna for the Express AM8 new generation geostationary telecommunications heavy satellite at the large-sized transformed mechanical systems centre of the Reshetnev Information Satellite Systems company in the Siberian town of Zheleznogorsk April 2, 2014. The Express AM6 is a new generation satellite providing services including Russian governmental and presidential mobile communication, digital television and broadcasting, according to the Reshetnev company representatives. (Photo by Ilya Naymushin/Reuters)

The Dragon Bridge (Vietnamese: Cầu Rồng) is a bridge over the River Hàn at Da Nang, Vietnam. Construction of the bridge began on 19 July 2009 (the same day as the inauguration of the nearby Thuận Phước Bridge) when the Prime Minister of Vietnam Nguyen Tan Dung and many high-ranking government officials attended the groundbreaking ceremony. Dragon Bridge is 666m long, 37.5m wide and has six lanes for traffic. It opened to traffic on March 29, 2013, at a cost os nearly VND 1.5 trillion dong (US$88m). The bridge was designed by the US-based Ammann & Whitney Consulting Engineers with Louis Berger Group. Construction was undertaken by Company No. 508, an affiliate of Civil Construction Engineering Corporation No.5, and Bridge Company No. 75.