An international team of paleontologists and Earth scientists has identified fossilized remains as a two-clawed therizinosaur. The fossils were unearthed more than a decade ago in Mongolia. Their paper is published in the journal iScience.

Made of keratin (the same material as fingernails), the sheath reveals that the claw itself was much longer than the underlying bones. It is the largest claw of its kind found fully preserved in this way,