Greek inventor and mathematician Hero of Alexandria is remembered for his iconic work on geometry, Metrica, which was lost for many years but was then discovered after 1896. His most significant contributions include the Heron’s formula to find the area of a triangle, the Hero engine, and a wind-harnessing machine.
Alexis Tsipras is a Greek politician who served as the Prime Minister of the country from 2015 to 2019. From 2018 to 2019, he served as the Minister for Foreign Affairs. The current Leader of the Opposition, Alexis Tsipras has also been serving as the president of Syriza, the left wing political party in Greece . In 2015, he was named among 100 most influential people by Time.