The universe is expanding, but what exactly is it expanding into?
The nature of what the universe is expanding into is complicated, say our readers, and may be beyond our comprehension
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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?
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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
What caused the pictured red-only 鈥渞ainbow鈥�. And are human children and babies uniquely noisy compared with the offspring of other animals?
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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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Aside from our perception, how can we know that time exists?
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This week鈥檚 new questions
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