After an in-depth analysis of the genetic material from hundreds of swabs taken from the walls, floors, machines and drains inside the Huanan Seafood Wholesale Market in Wuhan, China — a site that’s been described as an epicenter of early spread of Covid-19 — scientists say they now know exactly which species of animals were in the same area where investigators also found the most positive samples the virus that causes Covid-19.

Genetic evidence from a new report suggests the coronavirus pandemic most likely spilled over from animals in the Wuhan market.

That theory is now supported by a new study analyzing more than 800 samples collected in and around the market in January 2020 as the pandemic began. Those samples show that animal species known to carry the COVID coronavirus were present in the market,