MADRID (AFP) ― Archaeologists said Wednesday they have found a flint blade dating back 1.4 million years in the caves of Atapuerca in Spain, the earliest sign of a human presence at the site.

The 3-centimeter blade was found in the so-called Elephant Chasm cave where in 2007 researchers found a human finger and jawbone dating back 1.2 million years ― considered the remains of the “oldest European” ever found.

The find made this year, considered to be “of great value,” came from a carving knife, Eduald Carbonell, one of the directors of the dig, said during a presentation of the discovery.

The site, near the northern city of Burgos, has been under excavation since 1978. In 2000 it was classed by UNESCO as a piece of world heritage.

The oldest parts of the site are one and half a million years old.

Stone tools discovered in this site confirm the continuity of human settlement in Europe, the researchers said.

The finding contradicts the theory of some researchers who believe Europe was populated in small waves without continuity by groups doomed to extinction because of their inability to adapt to new surroundings, they said in their statement.

“Even though they are very archaic tools, they reflect complex activities such as recovering animals that fell into the caves,” which functioned as traps, the statement said.