This is the tenth of my twelve podcasts for the excellent series of daily podcasts known as 365 Days of Astronomy. My contributions are adapted from selected chapters of my recently published book: Big Questions: Universe. The book was published in the UK on 1 July and will be published in the US early in 2011.

If you’d like a preview of it, head over to 365 Days of Astronomy and listen as I discuss ‘Can the laws of physics change?’

Two more podcasts from the book will be posted before the end of the year, so watch this website for those.

To listen to September’s podcast, ‘Is there life on Mars?’ click here.

To listen to August’s podcast,  ‘Are We Made from Stardust?’ Click here.
To listen to July’s podcast, ‘What Were the First Celestial Objects?’ Click here.

To listen to June’s podcast, ‘How Did the Universe Form?’ Click here.
To listen to May’s podcast, ‘What are Black Holes?’ Click here.
To listen to April’s podcast, ‘Was Einstein Correct?’ Click here.
To listen to March’s podcast, ‘Why Do the Planets Stay in Orbit?’ Click here.
To listen to February’s podcast, ‘How did the Earth form?’ Click here.
To listen to January’s podcast, ‘What is the Universe?’ Click here.