An animal foetus in the earliest stages of development - in humans, in the first eight weeks after fertilisation. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A small, tube-like organ in the human body, attached to the start of the large intestine, and which appears to serve no useful function. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...

The organelles within plant cells where photosynthesis takes place, harnessing energy from sunlight to make sugars. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Or adaptive radiation, the divergence of life forms from a common ancestor, as they adapt to different environments. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

The process by which new species or variations within species evolve in populations. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

Flowering plants, or more precisely plants whose seeds are enclosed in a fleshy fruit, rather than being naked at pollination. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...

Any trace of an animal or plant that lived a very long time ago. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...

Lessons from the frontline: why the experiences of soldiers in the Falklands War made doctors rethink how they treat severe trauma wounds. Biology - Human Body - Learning Points. During the Falklands conflict, wounded soldiers in the...

Discover a tiny hummingbird with very unusual tail feathers. Biology - Animal Kingdom - Learning Points. There are over 300 species of hummingbird. Hummingbirds use specialised beaks to feed on nectar. The marvellous spatuletail gets its...

The grouping of organisms into categories with similar features. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...

A hierarchical system for biological classification, created by Carl Linnaeus in the 18th century. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

The ability of bacteria to survive exposure to an antibiotic, often by producing a protein that disables or prevents transport of the antibiotic into the cell. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds...

A very small infectious agent that can reproduce only inside other cells. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

The gradual change in living forms over successive generations, due to changes in inherited characteristics. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A characteristic that is passed down to an organism from its parents, being encoded in DNA. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

Invertebrates are animals without a backbone – but that’s the only thing they all have in common! Learn more about some of the many different types of invertebrate, from arthropods to sponges. Biology - Animal Kingdom - Learning Points....

The Earth is billions of years old and was once a very hostile place. Eventually, a single cell was formed that evolved and reproduced. What conditions produced this first life on Earth? Biology - Cells And DNA - Learning Points....

Learn how sexual selection governs mate choice, but also drives the evolution of species. Examples of physical and behavioural, intra and inter species sexual selection. Biology - Adaptation And Evolution - Learning Points. Selecting a...

The cheetah is the fastest land animal on Earth. Discover how its skeleton has evolved to make it ideally suited for speed. Biology - Animal Kingdom - Learning Points. The cheetah's supple back bones and loose hip and shoulder joints...

Did you know that albatrosses spend most of their lives at sea? Biology - Animal Kingdom - Learning Points. Some species of albatross have been known to fly 1000 kilometres in a single day. Albatrosses spend most of their lives at sea,...

Why the female marbled salamander must abandon her eggs in order to survive. Biology - Animal Kingdom - Learning Points. Unlike most salamanders, the marbled salamander reproduces entirely on land. The male drops sperm onto the ground...

Discover the reason for the sloth's slowness and how this has been an evolutionary advantage. Biology - Animal Kingdom - Learning Points. Sloths lead a solitary life consisting of minimal physical activity. Sloths descend from the forest...

Meet the species which have not evolved for millions of years. Why have they stopped evolving? Biology - Adaptation And Evolution - Learning Points. A Twig FactPack Film. Open a discussion on what has been already learnt in a topic, or...

2 million years ago, two species of apeman had evolved different strategies to survive the African environment. When the landscape changed, which would continue on the path to becoming human, and why? Biology - Adaptation And Evolution -...