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Animals at the extremes: Hibernation and torpor free course icon Level 2 icon

Nature & Environment 

Animals at the extremes: Hibernation and torpor

Hibernation is an ingenious adaptation that some animals employ to survive difficult conditions in winter. This free course, Animals at the extremes: Hibernation and torpor, examines the differences between hibernation and torpor, and discusses the characteristic signs of hibernation behaviour. It explores the triggers that bring on hibernation, and whether internal signals or external season cues are predominant. It also examines the physiological adaptations that occur in hibernating animals.

Free course
14 hrs
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Sperm counts article icon

Nature & Environment 

Sperm counts

Getting to grips with the numbers behind the man's part of the reproductive system. THIS ARTICLE CONTAINS FRANK DISCUSSION OF SEXUAL AND REPRODUCTIVE SCIENCE

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Evolution through natural selection free course icon Level 1 icon

Nature & Environment 

Evolution through natural selection

In this free course, Evolution through natural selection, we describe the theory of evolution by natural selection as proposed by Charles Darwin in his book, first published in 1859, On the Origin of Species by Means of Natural Selection, or The Preservation of Favoured Races in the Struggle for Life. We will look at natural selection as Darwin did, taking inheritance for granted, but ignoring the mechanisms underlying it.

Free course
4 hrs
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Animals at the extremes: The desert environment free course icon Level 2 icon

Nature & Environment 

Animals at the extremes: The desert environment

Animal life has adapted to survive in the most unlikely and inhospitable habitats. This free course, Animals at the extremes: The desert environment, looks at the surprisingly diverse desert climates throughout the world and mammals, birds, lizards and amphibians that survive there. It splits these animals into three groups according to their strategy for survival: evaders, evaporators and endurers, then discusses how these strategies work on a biochemical and physiological level.

Free course
14 hrs
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When is the best time to water during a heatwave? article icon

Nature & Environment 

When is the best time to water during a heatwave?

The sun is out, the sky is blue; there's not a cloud to spoil the view and have you seen what that's doing to the herbaceous border? Botanist Alastair Culham explains how to make the most of watering as Britain continues to experience a hot spell.

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Plastic planet article icon

Nature & Environment 

Plastic planet

The discovery of plastic unleashed humanity's creativity, as we embraced the magic of this versatile product. But it was at a cost - has the material which made the 21st Century brought about an environmental catastrophe?

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Water in the UK free course icon Level 2 icon

Nature & Environment 

Water in the UK

Water is arguably the most important physical resource as it is the one that is essential to human survival. Understanding the global water cycle and how we use water is essential to planning a sustainable source of water for the future. Globally, there are many areas that do not have enough water to support the current population adequately. Decisions will have to be made on the best way to use water in a world where there is climate change. This free course looks at Water in the UK where water supplies are limited in certain areas, as shown by recent droughts.

Free course
7 hrs