The mysterious Denisovans: a lost branch of the human family tree

Science · Published 8 October 2026 Swipe more like this →

In short: For much of human history, we were not alone. In the Altai Mountains of Siberia, scientists discovered a lost lineage of archaic humans known as Denisovans. Their existence, once hidden in bone fragments, is now reshaping our understanding of how different human species coexisted and intermingled across Eurasia.

The Denisovans were an archaic human group that emerged approximately 370,000 years ago during the Pleistocene Epoch. They spread across eastern and southern Asia, reaching parts of Melanesia, before vanishing sometime after 30,000 years ago. While their exact place in human taxonomy remains a subject of intense debate, some scholars suggest they represent a distinct species like H. denisova or H. longi, while others argue they are a subspecies within the genus Homo. Their physical remains are quite sparse. Currently, scientists only possess a few molars, partial mandibles, and various bone fragments. These specimens have been located in several caves across Russia, China, and Laos.

The discovery of this lineage was unconventional. Unlike many ancient humans identified through large skeletons, the Denisovans were first identified in 2010 through DNA sequences extracted from a single fossil finger bone found in 2008. This breakthrough in evolutionary genetics, centered on Denisova Cave (Aju-Tasch) in the Altai Mountains, earned Swedish geneticist Svante Pääbo the 2022 Nobel Prize for Physiology or Medicine. This research highlights the importance of the Altai Mountains. The site is where the initial fossils were first located.

Recent findings continue to expand the map of their influence. In 2025, researchers announced the identification of Denisovan DNA in a skull from China—the Harbin cranium—which is estimated to be at least 146,000 years old. This discovery adds nuance to the theory that Denisovans descended from a late-migrating H. erectus lineage that moved from Africa to Eurasia roughly 700,000 years ago, eventually splitting from the Neanderthal lineage about 370,000 years ago. The Harbin cranium, also known as dragon man, lacks a lower jaw. It was originally found near Harbin, China, back in 1933.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Genome from a Siberian finger bone reveals a new ancient human group
• Why we still cannot reconstruct the physical appearance of the mysterious Denisovan species
• Denisovans used meat, marrow, and hides to survive on the Tibetan Plateau
• Ancient DNA from cave sediments reveals shifting populations in prehistoric Siberia
• The towering giants of Asia: were Denisovans much larger than we imagined?
• The world's most detailed anatomical atlas was created by Nazis using victims' bodies.
• How humanity is finally touching the sun with the Parker Solar Probe
• The ocean floor isn't always where your sonar says it is
• How a single parasite can turn a predator into a king
• The Higgs field might be balancing our universe on a razor's edge
• Why is the night sky dark if the universe is filled with stars?
• Why the Nobel Prize in Physics is now awarding Artificial Intelligence

More in Science · Latest · A–Z · All topics