This week鈥檚 new questions
Why does sticking my tongue out seem to help me concentrate? And if energy cannot be created or destroyed, where does it come from?
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Why can鈥檛 I judge the temperature of bathwater with my left hand?
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The universe is expanding, but what exactly is it expanding into?
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This week鈥檚 new questions
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Do house spiders released outside survive, or navigate back?
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If my brain atoms were replaced with identical ones, am I still me?
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Do magnets have any effects on human cells? (part 2)
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This week鈥檚 new questions
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Why do we have five digits on each hand, and not some other number?
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When does a theory become a fact and who decides?
Can a theory ever become a fact? Our readers weigh in
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Can bullets fired in the air cause injury when they return? (part 2)
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This week鈥檚 new questions
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If mosquitoes were eradicated, what would be the consequences?
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Is it just a coincidence that there are two dippers in the night sky?
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