️<unk>️<unk>️<unk>️  (CNN) With the discovery of a gray, fossilized jawbone in a remote corner of Ethiopia, a student at Arizona State University may have changed our understanding of our earliest ancestors. (CNN) With the discovery of a gray, fossilized jawbone in a remote corner of Ethiopia, a student at Arizona State University may have changed our understanding of our earliest ancestors. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Chalachew Seyoum, a graduate student from Ethiopia, came across the fossil -- the left side of a lower jaw with five teeth -- while on a field expedition in the Afar region of eastern Ethiopia in 2013.<unk> Chalachew Seyoum, a graduate student from Ethiopia, came across the fossil -- the left side of a lower jaw with five teeth -- while on a field expedition in the Afar region of eastern Ethiopia in 2013. Honestly, it was an exciting moment,<unk> Seyoum said, according to a news release from the university.<unk> "Honestly, it was an exciting moment",<unk> Seyoum said, according to a news release from the university. ️<unk>️<unk>️<unk>️<unk>️ I climbed up a little plateau and found this specimen right on the edge of the hill.<unk> I climbed up a little plateau and found this specimen right on the edge of the hill.<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> ąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąą Researchers have previously found fossil remains dating back 3 million years or more, such as the skeleton of "Lucy", the famous 3.2 million-year-old remains of the species Australopithecus afarensis.<unk> Researchers have previously found fossil remains dating back 3 million years or more, such as the skeleton of "Lucy", the famous 3.2 million-year-old remains of the species Australopithecus afarensis. ️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąąą "Importance of the specimen is that it adds a data point to a period of time in our ancestry in which we have very little information", said William H. Kimbel,...
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