Unmoving escalators, circumnavigating ash clouds and orange oranges
Why does it feel unusual when walking on a stationary escalator? Plus: why did the recent Chilean volcano ash cloud travel in the opposite direction to the prevailing winds? And why are oranges orange?
Click to listen
- MP3 (00:37:28; 17Mb 240kb)
Questions discussed this week include:
- How can someone accurately measure radiation levels when at the beach? (Question from Japan)
- Why can body and ear piercings sometimes go black?
- Why does it feel unusual when walking on a stationary escalator?
- After drinking lots of alcohol, why do you have to keep urinating after you go for the first time?
- If you were able to see back in time could you see actually the dinosaurs?
- During the recent grasshopper plague in Canberra, why were the grasshoppers attracted to horizontal metal surfaces?
- Why did the recent Chilean volcano ash cloud travel in the opposite direction to the prevailing winds?
- Why do some power points and electrical cables sometimes excrete green ooze?
- How could a microwave oven sometimes set off a hands-free sink?
- Why are oranges orange?
- Are colds and flus transferrable to a partner during sex?
- What happens when water is boiled more than once?
- Does high-voltage electricity (2000+ volts DC) affect the atmosphere around it?