How much of hunger is hormonal?

Ask an Expert How much of hunger is hormonal and how much is linked to the nervous system? What are the receptors and how do they act?moreHow much of hunger is hormonal?
Thursday, 20 November 2008Tags: neuroscience, brain-and-nervous-system, askanexpert

Why don't all comets fall into the Sun?

Ask an Expert How is it that these relatively tiny objects (compared to the Sun) can travel such huge distances and yet orbit the Sun rather than be swallowed by it?moreWhy don't all comets fall into the Sun?
Thursday, 06 November 2008Tags: astronomy-space, physics, askanexpert

Why are fingerprints only found on some types of skin?

Ask an Expert Why are fingerprints only found on some types of skin and not all over the body?moreWhy are fingerprints only found on some types of skin?
Wednesday, 15 October 2008Tags: genetics, anatomy, askanexpert

What is geothermal energy?

Ask an Expert What is geothermal energy? It is being installed as our new school is built. I've had heaps of questions about it.moreWhat is geothermal energy?
Thursday, 02 October 2008Tags: energy, geology, geothermal-energy, askanexpert

What's the difference between hail and snow?

Ask an Expert What's the difference between hail and snow? Aren't they both frozen water?moreWhat's the difference between hail and snow?
Thursday, 18 September 2008Tags: weather, askanexpert

Why are most space objects smooth?

Ask an Expert If objects in space grow bigger as a result of smaller pieces colliding and 'sticking' together, why don't small asteroids look like coco pops?moreWhy are most space objects smooth?
Tuesday, 02 September 2008Tags: astronomy-space, askanexpert

Why is it cooler up in the mountains?

Ask an Expert Why is it cooler up in the mountains though it's closer to the sun and hot air rises?moreWhy is it cooler up in the mountains?
Thursday, 21 August 2008Tags: weather, askanexpert

What should I plant to balance my carbon footprint?

Ask an Expert What plants should I put in my garden to help balance my carbon footprint?moreWhat should I plant to balance my carbon footprint?
Wednesday, 23 July 2008Tags: climate-change, environmental-management, gardening, botany, energy, askanexpert

Are impact craters always circular?

Ask an Expert If meteorites impact the Earth at an angle, why are impact craters always circular and not elliptical?moreAre impact craters always circular?
Thursday, 10 July 2008Tags: astronomy-space, earth-sciences, geology, physics, askanexpert

Why don't we throw rubbish into volcanoes?

Ask an Expert Is there a reason why we don't throw our garbage into the volcanoes around the world? Read the answer and have your say.moreWhy don't we throw rubbish into volcanoes?
Thursday, 26 June 2008Tags: pollution, recycling-and-waste-management, earth-sciences, geology, askanexpert