They weren't so successful at conquering Europe or China. Of course, one can blame the long supply lines, but in these cases their adversaries were also determined to repulse them.
In contrast, Byzantium and Persia were exhausted from mutual warfare. Tribes related by kinship to Muslim Arabs had served as mercenaries during this period, so there was a lot of tactical knowledge available.
The Byzantines retreated to the highlands of Anatolia upon losing their lower-lying provinces to the Muslims. I am not sure if they launched a determined counter-attack. The Persians did, but they could not fight coherently.
(1) data triangulation: the use of multiple data sources in a single study; (2) investigator triangulation: the use of multiple investigators/research- ers to study a particular phenomenon; (3) theory triangulation
<span>Genetics.
Gregor Mendel is considered the "father of genetics" in modern science. Johann Mendel (his birth name) graduated from the Philosophical Institute at the University of Olmütz in 1843. Then he decided to become a monk, joining the Augustinian order at the St. Thomas Monastery in Brno (in the Austrian empire). As a monk, he was given the name Gregor.
He continued his studies in the sciences at the University of Vienna, his studies funded by the monastery. Around 1854, Mendel began experimenting with plants in the monastery's garden, especially exploring the transmission of hereditary traits in plant hybrids.
From his experiments with pea plants, he proposed basic laws of genetics such as the Law of Segregation (that there are dominant and recessive traits which are passed on from parent to offspring), and the Law of Independent Assortment (that individual traits were transmitted from parent to offspring independently of other traits).</span>
<span>Being Tributary has its own pros and cons. The advantages are development of each empire. Cultural infusion is unavoidable. sometimes the influence can be constructive otherwise destructive. Japan adapted the Imperial court system, art styles and Buddhism, whereas Vietnam and Korea were influenced by communism, that is usually frowned upon nowadays..</span>
