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Red-eyed Underleaf (Teratophthalma maenades) is distributed from Colombia to Peru. This species occurs in rainforest and cloudforest habitats at elevations between about 800-1800m. The butterflies are never seen in open sunlit areas, instead preferring the darkness of the forest understorey. The adults are secretive by nature, spending long periods resting under the leaves of low growing vegetation, with wings spread open.

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#Quicksort or partition-exchange sort is aptly named because, when properly implemented, it is the fastest known general-purpose in-memory sorting algorithm in the average case. Quick sort is a sorting algorithm developed by Tony Hoare that, on average, makes O(n log n) comparisons to sort n items.

Tony Hoare and Jo Williams at the Piedra Negra bivy, below their objective, Aguja Guillaumet, Patagonia

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Extreme Photo of the Week

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"There are two methods in software design. One is to make the program so simple, there are obviously no errors. The other is to make it so complicated, there are no obvious errors.", Tony Hoare

Advice for Ph.D. students from Tony Hoare

At the International Summer School Marktoberdorf Tony Hoare was asked to give the talk at the closing session. He gave a lot of advices for Ph.D. students,…

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Tony Hoare, Faye Atkinson, Margaret Gmoser and Chic Scott on thier 19-day expedition from Jasper to Lake Louise.