(PLOS) Narwhals — enigmatic arctic whales known for their sword-like tusk — spend over half their time diving to find food but are also able to last up to three days without a meal, according to a study by Manh Cuong Ngô and colleagues from the University of Copenhagen in Denmark, published in PLOS Computational Biology.

Original source: https://www.eurekalert.org/pub_releases/2019-03/p-nsa030619.php