Arch. Nada An

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How and Why We Age: The Power of Telomeres and Telomerase

Twenty years ago little was known about the aging process. Many ideas existed but nothing was certain. Today we know how and why we age. We cannot control it just yet, but even that may change in the near future.<p>The human body has 100 trillion highly-specialized cells. Each of these cells has sets …

What is an Analemma?

<i>What is an Analemma?</i><p><i>An analemma is the figure “8″ loop that results when one observes the position of the sun at the same time during the day over the course of a year. Due to the earth’s tilt about its axis (23.45°) and its elliptical orbit about the sun, the location of the sun is not constant from day to day when observed at the same time on each day over the course of a full year. Furthermore, this loop will be inclined at different angles depending on one’s geographical latitude.</i>

Leonardo da Vinci: Anatomy of an artist

If Leonardo da Vinci’s uncannily accurate studies of the human body had been published in his lifetime, they would have changed the course of science, says Alastair Sooke.<p>One day, probably during the winter of 1507-08, <b>Leonardo da Vinci</b> found himself chatting with an old man in the hospital of Santa …

New Theory: The Universe Isn't Expanding, It's Just Gaining Mass

But you'd never know, because everyone is getting more massive at the same time.<p>Whoa. One cosmologist is proposing that the universe isn't actually expanding, as the standard theory goes. Instead, the redshift effects astronomers see could mean that everything is just gaining more mass, while …