GEOPHYSICS: Why Are Old Mountains High?

Why Do Tropical Mountains Support Exceptionally High Biodiversity? The Eastern Arc Mountains and the Drivers of Saintpaulia Diversity

We combine information about the evolutionary history and distributional patterns of the genus Saintpaulia H. Wendl. (Gesneriaceae; 'African violets') to elucidate the factors and processes behind the accumulation of species in tropical montane areas of high biodiversity concentration. We find that high levels of biodiversity in the Eastern Arc Mountains are the result of pre-Quaternary speciat...

Why are horses high - performance athletes ?

It is pure fascination to watch the field of steaming Thoroughbreds thundering in full racing speed past the tightly packed stands of spectators in the marvelous mountain arena on the snow-covered lake of St. Moritz! A horse is able to accelerate from 0 to 60 km/h in only a few seconds, the heart rate speeding up to 200 bpm. Per minute, over 300 liters of blood are pumped through the body and a...

Geophysics. Are Earth's core and mantle on speaking terms?

Why do old flies die?

we get older we become more likely to get sick and, eventually, die. Although the underlying pathologies and major causes of death in elderly humans have been well documented, much less is known about the events leading to age-related death in the fruit fly Drosophila melanogaster-one of the premier model systems in aging research. What is the underlying pathology that limits the lifespan of a ...

Why Events Are a Bad Idea (for High-Concurrency Servers)

Event-based programming has been highly touted in recent years as the best way to write highly concurrent applications. Having worked on several of these systems, we now believe this approach to be a mistake. Specifically, we believe that threads can achieve all of the strengths of events, including support for high concurrency, low overhead, and a simple concurrency model. Moreover, we argue t...