Gedanken's eccentric uncle sends her into outer space in a spacecraft to help him conduct a series of experiments regarding the law of relativity as it affects time and space.

Book Two in an action-packed adventure series - which also explores the three great physics theories of Albert Einstein!

This is the final volume in the trilogy for young readers investigating the three great physics explorations of Albert Einstein. Uncle Albert's niece Gedanken drinks from a magic bottle and shrinks into the tiny world of quarks and electrons where she confronts the riddle of the quantum.

'Where is the centre of the universe?' 'Why is water wet?' 'What are atoms made of?' 'Will the sun ever blow up?' Fresh from Uncle Albert's postbag here are 100 science questions from children on subjects including Black Holes, atoms, clouds, colour and volcanoes.

This book examines the historical forces that led to the development of the system of apartheid, what life was like under the system for both blacks and whites, and the efforts that caused the end of this system.

In this book, Russell Stannard replies to 60 letters from children asking about science and the nature of the universe. Questions include: How many space aliens are there?; Why doesn't God fall out of the sky?; and Do animals go to heaven?

Einstein's theory of relativity shattered the world of physics - replacing Newtonian ideas of space and time with bizarre and counterintuitive conclusions: a world of slowing clocks and stretched space, black holes and curved space-time. This Very Short Introduction explores and explains the theory in an accessible and understandable way.