Homo facts for kids

Quick facts for kids Homo Temporal range: Piacenzian–present, 2.8–0Ma PreЄ Є O S D C P T J K Pg N ↓
Notable members of Homo. Clockwise from top left: A reconstructed Neanderthal (Homo neanderthalensis) skeleton, a modern human (Homo sapiens) female with a child in India, a reconstructed Homo habilis skull, and a replica skull of Peking Man (subspecies of Homo erectus).
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Suborder:	Haplorhini
Infraorder:	Simiiformes
Family:	Hominidae
Subfamily:	Homininae
Tribe:	Hominini
Genus:	Homo Linnaeus, 1758
Type species
Homo sapiens Linnaeus, 1758
Species
Homo sapiens †Homo antecessor †Homo cepranensis †Homo erectus †Homo ergaster †Homo floresiensis †Homo georgicus †Homo habilis †Homo heidelbergensis †Homo juluensis †Denisovans / Homo longi †Homo luzonensis †Homo naledi †Homo neanderthalensis †Homo rhodesiensis †Homo rudolfensis For other species or subspecies suggested, see below.
Synonyms
Synonyms Africanthropus Dreyer, 1935 Atlanthropus Arambourg, 1954 Cyphanthropus Pycraft, 1928 Palaeanthropus Bonarelli, 1909 Palaeoanthropus Freudenberg, 1927 Pithecanthropus Dubois, 1894 Protanthropus Haeckel, 1895 Sinanthropus Black, 1927 Tchadanthropus Coppens, 1965 Telanthropus Broom & Anderson 1949

The word Homo means "human" in Latin. It is the scientific group that includes all modern humans (Homo sapiens) and many of our closest extinct relatives. These ancient human species are sometimes called "archaic humans."

Our human family, Homo, first appeared in Africa. Scientists believe we evolved from an earlier group called Australopithecus. The oldest known member of the Homo group is Homo habilis, which lived over 2 million years ago.

Later, Homo erectus appeared about 2 million years ago. This species was very successful. They spread out of Africa and into parts of Asia. They lived for over a million years, slowly changing into new human species.

Modern humans, Homo sapiens, first appeared in Africa between 300,000 and 200,000 years ago. Around the same time, Neanderthals (Homo neanderthalensis) lived in Europe and Western Asia. Homo sapiens eventually spread from Africa across the globe. They sometimes met and shared genes with other archaic human groups. Many of these older human species, like Neanderthals, lived until about 40,000 years ago.

Understanding Our Human Family Tree

What Does Homo Mean?

The name Homo comes from the Latin word for "human being." The famous scientist Carl Linnaeus first named our species Homo sapiens in 1758. Sapiens means "wise," so our full scientific name means "wise human."

How Scientists Classify Humans

When new fossils are found, scientists study them carefully. They look for features that show how different species are related. This helps them decide which species belong in the Homo group. It's like building a family tree for all humans, past and present.

For a long time, scientists defined Homo by two main things:

• Walking fully upright on two legs (bipedalism).
• Using tools.

However, new discoveries sometimes challenge these ideas. For example, some older species, like Australopithecus, also walked upright and might have used simple tools. This shows that science is always learning and updating its understanding!

Many ancient human fossils were once given different names. But over time, scientists realized that many of these were actually variations of Homo erectus. So, names like Pithecanthropus are now considered synonyms for Homo.

The human family tree showing different hominin species over time.

A simplified family tree showing how humans (Homo) are related to other great apes like chimpanzees and gorillas.

How Humans Evolved

From Australopithecus to Homo

Scientists believe the Homo group evolved from an earlier group called Australopithecus. Several Australopithecus species, like Australopithecus afarensis (famous for the "Lucy" fossil), show features that link them to our human ancestors.

A big change between Australopithecus and Homo was the increase in brain size. Early Homo habilis had a brain about 660 cubic centimeters. Later, Homo erectus had brains around 760 cubic centimeters. Modern humans have even larger brains, up to 1800 cubic centimeters. This growth in brain size allowed for more complex thinking and tool-making.

The "Handy Man": Homo habilis

Homo habilis lived about 2.1 million years ago. Its name means "handy man" because it was the first human species known for making and using simple stone tools. These tools helped them cut meat and process food.

For a while, scientists thought Homo habilis was the direct ancestor of later human species. However, new fossil discoveries show that Homo habilis lived at the same time as Homo erectus for many years. This suggests they might have shared a common ancestor instead.

A reconstruction of Homo ergaster, an early form of Homo erectus.

The "Upright Man": Homo erectus

Homo erectus appeared about 2 million years ago. Its name means "upright man" because it was fully adapted to walking on two legs. This species was very successful and spread widely.

Homo erectus was the first human species to leave Africa. They migrated into Asia and possibly Europe. They used more advanced stone tools and may have been the first to control fire. This allowed them to cook food and stay warm in colder climates.

Scientists believe that Homo erectus eventually evolved into other human species, like Homo heidelbergensis, which lived in Europe and Africa.

A museum exhibit showing what Homo heidelbergensis might have looked like.

Our Human Family Tree

Scientists use special diagrams called cladograms to show how different species are related. These diagrams are like family trees, showing when different branches of the human family split off.

Here are some ways scientists think our human family tree looks:

This cladogram shows the relationships between different early human species. The numbers in parentheses show how many millions of years ago (Mya) these groups are thought to have separated.

Sometimes, different groups of early humans, like Neanderthals and modern humans, lived in the same areas. Evidence shows that these groups sometimes shared genes. This means they interbred, and some of their genes are still present in people today.

Spreading Across the World

Early Migrations of Homo erectus

About 1.8 million years ago, Homo erectus began to spread out of Africa. They moved into Western Asia and eventually reached places like Indonesia. This was a huge step for humanity, as it was the first time humans lived outside of Africa.

The map shows how different human species spread across the world over time.

Later Migrations and Modern Humans

Homo neanderthalensis and Homo sapiens developed after about 300,000 years ago. Homo sapiens soon spread throughout Africa. They also moved into Western Asia in several waves, possibly as early as 250,000 years ago.

In July 2019, scientists found 210,000-year-old remains of Homo sapiens in Greece. This was much older than previous finds in Europe. Around 60,000 years ago, Homo sapiens began a major migration. This led to humans settling in Oceania and Eurasia.

Modern humans (Homo sapiens) met and shared genes with archaic humans. This happened both in Africa and in Eurasia. For example, they interbred with Neanderthals and Denisovans. Most archaic human species were gone or absorbed by modern humans around 40,000 years ago.

Different Types of Homo Species

Scientists are still learning about all the different species in the Homo group. New discoveries often change our understanding. The table below lists some of the known Homo lineages. It shows where and when they lived, their size, and brain capacity.

Some species, like Homo rudolfensis or Homo ergaster, are still debated. Scientists sometimes classify them as separate species or as variations of others. For example, Homo heidelbergensis is closely related to Neanderthals. Some even consider them to be subspecies of Homo sapiens.

It's important to remember that these ancient human groups could often interbreed. This means they could have children together. This is why we see shared genes between different human lineages today.

Images for kids

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  The Harbin cranium, possibly belonging to Homo longi (Denisovan).

See also

In Spanish: Homo para niños

• Human evolution
• Recent African origin of modern humans