When Did Humans First Appear On Earth?

when did humans first appear

Humans first appeared on Earth at least 315,000 years ago. This figure is based on fossil remains found in Jebel Irhoud, Morocco – the earliest-known remains of modern humans.

The exact time humans first appeared is difficult to judge because species don’t come into being overnight. Rather, they change and evolve slowly from ancestral species.

Because the first human remains date back to around 315,000 years ago, our species will therefore have appeared some time before this. DNA evidence from human chromosomes indicates that humans (scientific name: Homo sapiens) may have first appeared more than half a million years ago.

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What Is Biology About & Why Biology Is Important

What Is Biology About

What Is Biology About?

Biology is the study of biota – living things. This includes humans, animals, plants, bacteria and viruses, together with their constituent parts (cells, organs, etc.). Biology also includes the study of the non-living components of living things, such as DNA, proteins and carbohydrates.

Like all science, biology is driven by curiosity. Biologists explore questions like:

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What Is An Ecosystem? Exploring Earth’s Terrestrial & Marine Ecosystems

what is an ecosystem

On this page we ask ‘what is an ecosystem?’, and explore the various different types of ecosystem present on Earth. In addition, we take a look at the roles that different organisms play within an ecosystem, and compare ecosystems to biomes.

Let’s take a look at the fascinating world of ecosystems…

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Animal Classification: How Scientists Make Sense Of The Animal Kingdom By Naming And Grouping Species.

Animal Classification

Animal classification facts and information for kids and students: how we make sense of the animal kingdom by naming and grouping species. Discover the 8 levels of animal classification.

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A free printable worksheet is available for this page. Click here or on the image below to download. Answers can be found on our worksheets page.

Animal Classification Worksheet
Free printable animal classification worksheet. Click image to download.

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TRAPPIST-1 Facts For Kids & Students: Information On Seven Planets That Could Hold Alien Life!

TRAPPIST-1 Facts

TRAPPIST-1 facts for kids & students. The discovery of seven new planets could take us one step further towards finding out whether or not we’re alone in the universe!

TRAPPIST-1 Facts: Introduction

In early 2017, NASA announced the discovery of seven Earth-sized rocky planets in orbit around a star that – in astronomical terms – isn’t very far away.

The planetary system was found by a robotic telescope, and further discoveries were made by a telescope in outer space.

As if that didn’t already sound too much like science fiction rather than ‘science fact’, NASA confirmed that three or more of the planets could potentially hold liquid water – one of the key ingredients for life!

On this page, you’ll discover facts about the star known as TRAPPIST-1, and the planets in orbit around it.

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What Is Science For Kids

What Is Science For Kids

In this article we’ll answer the question what is science for kids. Once we’ve agreed on a definition of science, we’ll look at the different types (branches) of science.

We’ll then look at the ‘scientific method’. This is the way in which scientists go about their work, and how they make their amazing discoveries!

What is science? Let’s find out …

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