Are premium-priced fuels really worth the extra cost? Why are males born with nipples? Is a male contraceptive pill in the offing? Do all animals get the same number of heartbeats? Does any one organ failing cause death? Can aeroplanes run on diesel? Why does silver tarnish? What causes lightning? Is mental illness curable? Join Dr Chris for the answers to this week's crop of queries from South Africa.
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Would a heliumair gas blend stay in a balloon for longer than just helium?
Do labs test for oestrogens and oestrogenlike chemicals in drinking water?
Could the electrical current in a laptop influence an ant walking across it?
Allelectric transport for the UK?
What is the formation inside this geode any ideas?
Do labs test for oestrogens and oestrogenlike chemicals in drinking water?
Could the electrical current in a laptop influence an ant walking across it?
Allelectric transport for the UK?
What is the formation inside this geode any ideas?
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