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Try to measure a circle. The diameter and radius are easy, they're just straight lines you can measure with a ruler. But to get the circumference, you'd need measuring tape or a piece...
Neko Harbour by TravelPod member mikeandmary Neko Harbour by TravelPod member mikeandmary Neko Harbour by TravelPod member mikeandmary Neko Harbour by TravelPod member mikeandmary Neko Harbour by...
A day on earth is decievingly simple concept Today we'll examine that day on earth, in detail perhaps uncovering a few surprises A day is the length of time takes the earth to spin three...

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Phil Plait: If they were to fake the moon landings and there were some people in there that were gonna do this, why would they send von Braun to Antarctica? Why would they take pictures of von Braun,...