HEALTH AND WELLNESS

                                                     A local whirl of dust, usually not more than a few yards in diameter, in which the particles are swept round and round the centre, and are lifted to considerable heights –sometimes to 2,000 or 3,000 feet above the earth’s surface. It is caused by excessive local heating by the sun in an arid region, a strong convection current being formed. Dust devils usually move over the desert at from 5 to 15 miles per hour, though speeds of over 30 miles per hour are sometimes reached, and as many as five or six of them may often be counted by the observer. Being so limited in size, they are harmless even to aviation.       A storm in which a thick mass of dust obscures t...

                                                               Have you ever looked at the night sky through a telescope? Many who have can tell you that they still remember the first time they found themselves looking at the planet Saturn. It is almost a startling sight. Against a backdrop of endless black dusted with countless glittering stars, there hangs a luminous orb wreathed with flat, elegant rings!            What are these rings? Back in 1610, when the astronomer Galileo first looked at Saturn through his handmade telescope, the view was so fuzzy that Saturn looked like a planet with ears –a central orb flanked by two ...