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Wednesday, 14 March 2012
How fast are carbon dioxide levels in the atmosphere rising? How can you tell that rising carbon dioxide levels are caused by burning fossil fuels and not natural causes such as bushfires, volcanoes, rising ocean or soil temperatures?
Wednesday, 14 March 2012
Tuesday, 14 February 2012
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Tuesday, 24 January 2012 7
It's been pretty overcast lately but I noticed that the UV index rating on the daily weather forecast is extreme. Wouldn't clouds make the UV index lower?
Tuesday, 10 January 2012 24
I always thought the idea of a rotating space station would neatly get around the problem of no gravity, by artificially creating it by spin. Yet none of the current spacecraft designs include this feature. Why has this simple solution been abandoned?
Wednesday, 21 December 2011 27
How does Santa manage to deliver presents to the world in just one night? Could he be using time travel?
Tuesday, 13 December 2011 5
Does vinegar work for all jellyfish stings? And how does it work?
Wednesday, 23 November 2011 6
I was watching a movie where a super solar flare was about to enter the Earth and destroy all living things on the planet. Could this happen?
Tuesday, 15 November 2011 24
We divide the day into 24 hours, one hour into 60 minutes and one minute into 60 seconds. What other comparably accurate methods have been used throughout history?
Monday, 31 October 2011 6
On a recent holiday to Noosa I noticed how much more 'golden' the beach sand is compared to WA's beaches. Why is the sand so different in colour?
Tuesday, 18 October 2011 21
I know hot flushes are common for older women, but what are they caused by?
Tuesday, 4 October 2011 17
How can we be descended from monkeys if there are monkeys around today?
Wednesday, 21 September 2011 14
I have always wondered why things taste bad to some people. For example, I like the taste of broccoli but my wife can't even swallow it.
Tuesday, 6 September 2011 5
Why don't people stutter if they're listening to music while they read out loud?
Tuesday, 23 August 2011 14
If the universe is expanding and galaxies are moving away from each other, why do astronomers say the Milky Way and Andromeda galaxies are going to collide?
Wednesday, 17 August 2011 3
Have new technologies like mobiles, tablets and laptops turned us into multi-tasking masters?
Thursday, 11 August 2011 3
Are women better at multi-tasking than men? And does being a parent improve your ability to do more than two things at once?
Thursday, 28 July 2011 2
I've heard it said that without interstellar dust to obscure starlight that the night sky would be ablaze with light. Is this true?