Born in Babylonia in the late 2nd century CE, Abba ben Ayvo was one of the earliest amoraim—as the sages whose teachings make up the Gemara, or latter stratum of the Talmud, are known. His contemporaries knew him as Abba Arikha (Abba the Tall), but his influence was so great that the Talmud’s editors most often refer to him simply as Rav (rabbi). As a young man, he studied in the land of Israel before returning to his native country, which in his lifetime began to rival—and would later eclipse—Roman Palestine as the center of rabbinic intellectual activity. Henry Abramson presents a brief synopsis of his remarkable career. (Video, 4 minutes.)
Read more on Orthodox Union: https://www.ou.org/torah/dafyomi/bechoros/21/#rav-bechoros-21