Sentence Correction

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Sentence Correction

by Mantavya02 » Sat Feb 16, 2019 1:55 am
In the summer of 1980, the excavators found a fossilized bone ,leading to the discovery of a species of dinosaur that was / has been the largest to ever walk the earth.

Which of the two, 'was' or 'has been' is correct in the above sentence?