Anthropologists this week have discovered 39 bits of human remains while sifting through World Trade Center debris.

The operation at Fresh Kills on Staten Island began Monday on about 590 cubic yards of debris previously inaccessible to investigators because of construction at Ground Zero.

Most of the debris being sifted comes from around 130 Liberty St. on the south side of the site. Each bit of remains will undergo DNA testing in the hope it can be matched with a victim of 9/11.