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

Article
Climate change Copyrighted image Icon Copyright: Used with permission free course icon Level 2 icon

Nature & Environment 

Climate change

Climate change is a key issue on today's social and political agenda. This free course explores the basic science that underpins climate change and global warming.

Free course
18 hrs
Energy resources: Solar energy Copyrighted image Icon Copyright: Used with permission free course icon Level 2 icon

Nature & Environment 

Energy resources: Solar energy

Energy from sources other than fossil and nuclear fuels is to a large extent free of the concerns about environmental effects and renewability that characterize those two sources. Each alternative source supplies energy continuall, whether or not we use it, and most have their origins in energy generated outside the Earth, yet the potential of each is limited by its total supply set against its rate of use. The Sun will radiate energy until it ceases thermonuclear fusion, in around 5 billion years. This free course, Energy resources: Solar energy, explores the Sun as a potential source of usable energy.

Free course
2 hrs

Nature & Environment 

Blue Planet II

Sir David Attenborough presents Blue Planet II.

TV Programme

Nature & Environment 

The Deep: Polar 'pumps'

The life of almost all marine animals relies on the 'polar pumps' caused by rising and falling water. Philip Sexton explains how they work.

Article

Nature & Environment 

Palaeobiology: Solving the Riddle of the Gastroliths

The evidence explains why some prehistoric animals have stomach stones?

Article

Nature & Environment 

Palaeobiology: The Riddle of the Stomach Stones

Why did some prehistoric animals have stomach stones?

Article