Aaron Aaronsohn was born in Bacău, Romania, and brought to Palestine, then part of the Turkish Ottoman Empire, at the age of six, when his parents were among the founders of Zikhron Ya'akov, one of the pioneer Jewish agricultural settlements of the First Aliyah. Aaronsohn was the first car-owner in Palestine and one of the first to own a bicycle, which he brought back from France.
Agriculture and botany
After studying agriculture in France, sponsored by Baron Edmond de Rothschild, Aaronsohn worked in Metulla, then a new colony in the north of the country. He left Metulla to establish an organization for agricultural technology. He botanically mapped Palestine and its surroundings and became a leading expert on the subject. On his 1906 field trip to Mount Hermon, while trekking around the Upper Galilee in the area of Rashaya in what is now Lebanon, The geographical distribution of wild wheats in their historical setting and current context he discovered Triticum dicoccoides, whom he considered to be the "mother of wheat", an important find for agronomists and historians of human civilization. Geneticists have proven that wild emmer is indeed an ancestor of most domesticated wheat strands cultivated on a large scale today with the exception of durum wheat, while einkorn, a different ancient species, is currently just a relict crop. This discovery made Aaronsohn world-famous and, on a trip to the United States, he was able to secure financial backing for a research station established in Atlit in 1909. Aaronsohn built up a large collection of geological and botanical samples and established a library. Aaronsohn served as a scientific consultant to Djemal Pasha during a crop-destroying desert locust invasion in 1915. In March–October of that year, the locusts stripped the country of almost all vegetation. Aaronsohn and the team fighting the locust invasion was given permission to move around the area known as Southern Syria and made detailed maps of the areas they surveyed. Aaronsohn also collected strategic information about Ottoman camps and troop deployment.
Political activity and espionage
During World War I, the Ottomans had joined sides with the Germans, and Aaronsohn feared the Jews would suffer the same fate as the Armenians under the Turks. Together with his assistant Avshalom Feinberg, his sister Sarah Aaronsohn and a few others, Aaronsohn organized Nili, a ring of Jewish residents of Palestine who spied for Britain during World War I. He recommended the plan of attack through Beersheva that General Edmund Allenby ultimately used to take Jerusalem in December 1917 as part of the Sinai and Palestine Campaign. Owing to information supplied by Nili to the British Army concerning the locations of oases in the desert, General Allenby was able to mount a surprise attack on Beersheba, bypassing strong Ottoman defenses in Gaza. In 1917, Chaim Weizmann sent Aaronsohn on a political campaign to the USA. While there, Aaronsohn learned that the Ottoman authorities had intercepted a Nili carrier pigeon, which led to the arrest and torture of his sister Sarah and other members of the underground.
Death and legacy
After the war, Weizmann called on Aaronsohn to work on the Versailles Peace Conference. On 15 May 1919, under unclear circumstances, Aaronsohn was killed in an airplane crash over the English Channel while on his way to France. Some blamed the British government. Aaronsohn died a bachelor and had no children. His research on Palestine and Transjordanflora, as well as part of his exploration diaries, were published posthumously. After Aaronsohn's death, the director of British Military Intelligence, confirmed that Allenby's victory would not have been possible without the information supplied by the Aaronsohn group.
