Level 1 - Absolute Beginner
Scientists found old footprints in Kenya, a country in Africa. The footprints are next to Lake Turkana.
The footprints are very old. They are about 1.4 million years old. There are 21 footprints in total.
The footprints were made by eight people. But they were not modern humans. They were a different kind of human relative called Paranthropus boisei.
Scientists think all eight walked together at the same time. This helps us learn how they lived, a long, long time ago.
- footprint
- a mark left on the ground by a foot
- fossil
- the very old, hardened remains or marks of something that lived long ago
- relative
- someone connected to you by family or, here, by shared ancestry
- lakeshore
- the land next to a lake
- adult
- a fully grown person
- individual
- one single person
- extinct
- no longer existing; died out completely
- million
- the number 1,000,000
Level 2 - Elementary
A team of researchers working along the eastern shore of Lake Turkana in northern Kenya has identified 21 fossil footprints made by eight individuals of Paranthropus boisei, an extinct human relative, also called a hominin.
The footprints were preserved near an ancient lakeshore about 1.4 million years ago. They appear to record all eight individuals in the same place at roughly the same time, which suggests they traveled or gathered together.
The team, made up of researchers from the United States and Kenya, concluded that the eight trackmakers were likely all adults, and most probably adult males. There was no clear evidence of females or children among them.
The footprints also show that these individuals were surprisingly large and human-like in size, up to about 1.8 meters tall and around 75 kilograms in weight. That is bigger than earlier estimates, which were based only on a few rare fossil bones.
- hominin
- a member of the group of species that includes modern humans and their close extinct relatives
- preserve
- to keep something safe from damage or decay over a long time
- trackmaker
- an animal or person whose footprints were left behind and later found
- estimate
- a careful guess based on available information
- evidence
- facts or signs that show something is true
- gather
- to come together in one place
- species
- a group of living things that share the same basic features
- ancient
- belonging to a time very far in the past
Level 3 - Intermediate
An international team of researchers working along the eastern shore of Lake Turkana in northern Kenya has identified 21 fossil footprints made by eight individuals of Paranthropus boisei, an extinct hominin species, preserved near an ancient lakeshore roughly 1.4 million years ago.
The tracks appear to record all eight individuals occupying the same place at roughly the same time, suggesting they traveled or gathered together. That pattern offers rare direct evidence of group behavior in a species otherwise known mainly from scattered, isolated bones.
The team, made up of researchers from the United States and Kenya, concluded that the trackmakers were likely all adults, most probably males, with no obvious evidence of females or children among them. The footprints also indicate surprisingly large, human-like body sizes, up to about 1.8 meters tall and around 75 kilograms, larger than earlier estimates drawn from rare fossil bones alone.
Researchers describe the find as a snapshot of what they call fossil behavior. Unlike bones, which can accumulate in one place over long stretches of time, footprints capture a single, brief moment in the lives of the individuals who made them, making this trackway an unusually direct window into how Paranthropus boisei, a robust-jawed hominin roughly contemporaneous with early members of our own genus, Homo, may have moved through its world.
- trackway
- a set of footprints left in a line, showing where an animal or person walked
- contemporaneous
- existing or happening during the same period of time as something else
- robust
- strong and sturdily built
- genus
- a scientific grouping of closely related species
- scattered
- spread out in different places rather than found together
- accumulate
- to gradually build up in quantity over time
- snapshot
- a brief record or impression of something at one particular moment
- isolated
- existing separately or apart from other things
Level 4 - Advanced
An international team of researchers working along the eastern shore of Lake Turkana in northern Kenya has identified 21 fossil footprints attributable to eight individuals of Paranthropus boisei, an extinct hominin species, preserved near an ancient lakeshore approximately 1.4 million years ago. The trackway represents one of the more substantial direct behavioral records yet recovered for this notoriously enigmatic branch of the human family tree.
The tracks appear to record all eight individuals occupying the same location at roughly the same moment, a pattern the researchers interpret as evidence that the group traveled or congregated together, rather than the footprints having accumulated incidentally across separate visits. Because such a reading depends on tight spatial and temporal association among the tracks, rather than on inference from disarticulated bone, the find offers an unusually direct glimpse of social behavior in a species previously known almost exclusively from scattered skeletal remains.
Composed of researchers from the United States and Kenya, the team concluded that the trackmakers were most likely all adults, probably predominantly male, with no obvious evidence of females or juveniles among them. The prints further indicate surprisingly large, human-like body proportions, up to roughly 1.8 meters in height and approximately 75 kilograms in mass, figures that exceed prior estimates derived from the comparatively rare fossilized bones attributed to the species.
Researchers frame the discovery as a rare instance of what they term fossil behavior. Whereas skeletal assemblages can accrue in a single locality across long, often indeterminate spans of time, a trackway captures a single, fleeting moment in the lives of the individuals who produced it, lending this find unusual immediacy as a record of how Paranthropus boisei, a robust-jawed hominin roughly contemporaneous with early members of our own genus, Homo, may have moved and associated within its environment, and reinforcing just how much about this well-documented yet still poorly understood species remains to be established.
- attributable
- able to be assigned or traced to a particular cause or source
- enigmatic
- difficult to interpret or fully understand; mysterious
- congregate
- to gather together as a group in one place
- disarticulated
- separated at the joints; no longer connected as a whole skeleton
- assemblage
- a collection of items, such as fossils, found together
- accrue
- to accumulate or build up gradually over time
- immediacy
- the quality of being directly and closely connected in time, without delay
- indeterminate
- not precisely known, fixed, or established
Talk about this article with KatePractice this story's vocabulary in a real spoken conversation with your AI tutor