A colossal ancient whale discovered in Peru might be the heaviest animal on record, according to a new study. At an estimated body mass of 85 to 340 metric tons, the heft of the now-extinct Perucetus colossus is equivalent to or exceeds that of the blue whale, said Giovanni Bianucci, first author of the study. It likely swam slowly due to its enormous body mass and swimming style, which was undulatory and anguilliform, meaning its flexible body moved in curvy waves from head to tail. Read more at the link in bio. 📷: Alberto Gennari