IN Sky and Telescope of September, under the heading “Saluting an Astronomer”, Joseph R. Habes has an article which describes the method adopted by Eratosthenes for measuring the circumference of the ...

The following essay is extracted from “Stone Circles Explained” by Stephen Childs. This book offers some alternative and less explored theories of the purpose of stone circles. Not all stone circles ...

In today’s age, “How far is the stream?” is an oft-repeated query that trekking and hiking groups brace themselves for from the newbies, before breaking into a wry smile. They then recount an amusing ...