# Geographic Literacy

Declining geographic literacy in the hyper-information age is a curious paradox. It may also spell trouble for our over-used planet. This post starts to look at this issue in more detail.

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# On the Flip Side

Have you ever wondered who or what is on the other side of the planet? This post takes a look at what is straight down and upside down. It also ponders the Earth's strange antipodal balance.

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# The Shadow Knows

The size of the Earth was calculated with surprising accuracy by Eratosthenes in the second century BC. His method was both brilliant and simple. This article describes a classroom experiment for repeating his results.