Scientists in Britain say ancient humans may have learned to make fire far earlier than previously believed, after uncovering evidence that deliberate fire-setting took place in what is now eastern England around 400,000 years ago.

The findings, described in the journal Nature, push back the earliest known date for controlled fire-making by roughly 350,000 years. Until now, the oldest confirmed evidence had come from Neanderthal sites in what is now northern France dating to about 50,000 years ago.

The discovery was made at Barnham, a Paleolithic site in Suffolk that has been excavated for decades. A team led by the British Museum identified a patch of baked clay, flint hand axes fractured by intense heat and two fragments of iron pyrite, a mineral that produces sparks when struck against flint.