Explained examines why diets are often unsuccessful. It looks at the science that suggests that low carb, low fat, and body type diets as well as supplements and detoxification regimes simple do not work in helping most people lose weight. While the diet industry pushes us to avoid calories the food industry encourage us to eat more of them.
2018 • Health
Explained looks at the popular English sport of cricket. First developed in the mid-1800s, cricket has grown into one of the most popular sports in the world. It looks at the complicated and confusing rules behind the game and examines how the British Empire exported the game to its colonies including the West Indies and India. It also looks at different forms of the game including test cricket and Twenty20 cricket.
2018 • People
Never before in human history have we been richer, more advanced or powerful. And yet we feel overwhelmed in the face of rapid climate change. It seems simple on the surface. Greenhouse gases trap energy from the Sun and transfer it to our atmosphere. This leads to warmer winters, harsher summers. Dry places become drier and wet places wetter. Countless ecosystems will die while the rising oceans swallow coasts and the cities we build on them.
We all have a food footprint, but what foods create greenhouse gases? Craig Reucassel looks at different carbon footprints of the various foods we eat, and learns about the importance of where our food actually comes from.
The Great Lakes region provided geologists with much of the evidence for the frequent ice ages that visited North America. But the lakes may be a rather transient feature of the continent dependent upon the recurring ice ages to maintain their existence.
Between the blue sky above and the infinite blackness beyond lies a frontier that scientists have only just begun to investigate. In "At the Edge of Space," NOVA takes viewers on a spectacular exploration of the Earth-space boundary that's home to some of nature's most puzzling and alluring phenomena: the shimmering aurora, streaking meteors, and fleeting flashes that shoot upwards from thunderclouds, known as sprites.