Celebrating Earth Day 2013



(source: NASA)

Andrew Jones argues that we only have five years left to save the world. Isabel Stark suggests climate change is leading to a nightmare from which we will never awake;
 
Freya Derby celebrates the epic Voyager journey that revealed Earth's fragility; we celebrate the beautiful photograph 'Blue Marble' forty years after it was taken (see above); Daniel Rollins asks whether there is life on Mars and Tony Hicks presents a fascinating photograph of the face of the moon.

Sampad Sengupta asks whether the universe comes from nothing; Ed Harding asks why there is something rather than nothing; Jeremy Thomas investigates the past, present and future of space exploration.