Xolani Ngumbela

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Life and Contributions of Robert Koch, Founder of Modern Bacteriology

Koch discovered the bacteria that cause tuberculosis and cholera<p>The German physician <b>Robert Koch</b> (December 11, 1843 — May 27, 1910) is considered the …

Evolution’s Worst Mistake? How About External Testicles?

Of course there’s an explanation (sperm like to develop at lower temperatures). But really: What intelligent designer could have come up with …

Abraham Maslow and the Hierarchy of Needs

Abraham Harold Maslow (1908-1970)<p>On April 1, 1908, American psychologist <b>Abraham Harold Maslow</b> was born. He is best known for creating Maslow’s …

Winnie Mandela: A Life in Pictures

Confederation of African Football

6 reasons this is the perfect thank-you email to send after a job interview

• The interview thank you email is a crucial part of getting the job you want.<br>• When you don't send a thank you email or letter after an interview, you …

‘I went on a walk and returned to find my husband dead’

After her husband’s suicide, Kate Harding was overwhelmed by guilt and shame<p>I have been a widow for 11 weeks. It seems surreal to be writing that sentence and yet it is true. I was there; I know. Richard killed himself at home while I was walking the dog with my daughter, while my son was lying …

One of These Photos Could Be Our Next Magazine Cover

Or, one of yours. Look at some of our editor’s favorite submissions so far, then send your own best shot.<p>Stunning, engaging, inspiring—these are just some of the factors we look for when choosing a cover photo for <i>National Geographic Traveler</i> magazine. Whether it’s from a surprising location or …

Here's What Introverts Find So Annoying About What Extroverts Think

If you're someone who clearly identifies with being on either side of the personality fence, you know how challenging it can be living and working with people who can be so different from you.<p>Anywhere from a third to half of the population fits the definition of being introverted, meaning these …

We Traveled World’s Most Scenic Destinations And This Is What We’ve Photographed

We’re Jack Bolshaw and Marta Kulesza, and we spent the last few years of our lives photographing the mountains and writing about our experiences …

35 Best Valentine's Day Quotes Even The Biggest Cynics Can Get Behind

These sayings about love will make your heart melt.<p>Scribble one of these in a card to your sweetie this year, or keep one posted in your closet to remind yourself of just how powerful love can be.

19 beautiful places where you'll find heaven on Earth

New Zealand

Accurate blood pressure measurement is real core message of new guidelines

New U.S. guidelines mean that millions of people who had normal blood pressure yesterday have high blood pressure today.<p>A slight definitional change means that 46 per cent of Americans are now classified as hypertensive, compared with 32 per cent previously.<p>Whether that matters or not depends …

Study Illuminates Genetic Origins of Skin Color Diversity

For ages, humans have divided our species into groups based upon skin color. The shade of one's complexion has been a powerful influence upon human …

Anthropology

The Explosive Legacy of Guy Fawkes, the Man Behind the Mask

History MagazineHistory Magazine<p>A popular symbol of protest today, Guy Fawkes was first the face of treason because of his role in the murderous Gunpowder Plot of 1605.<p>Tensions were high in England in late October 1605, when an English nobleman, Lord Monteagle, received a mysterious letter. Along …

GPs to vote on breaking away from NHS to set up private model

GPs are threatening to break away from NHS and calling on their union to help them set up a "private alternative model," in a vote next week.<p>The motion, due to be debated by a national conference of doctors next week, follows repeated claims by the British Medical Association that the health …

The ultimate roast pork

A classic recipe for pork shoulder with rosemary. Pork leg tends to be dry, so the moister shoulder is a better bet. Roast it slow and low.<p><b>SERVES</b><p>6 with left overs<p><b>INGREDIENTS</b><p>2kg pork shoulder on the bone<br>• salt, pepper, 1tbsp finely chopped rosemary<br>• an onion and two carrots<br>• 500ml chicken stock<br>• 2tbsp</b> …

How a Runaway Nun Helped an Outlaw Monk Change the World

Martin Luther's marriage to Katharina von Bora scandalized their contemporaries—and formed a partnership that shaped the course of history.<p>In terms of marriage prospects, Martin Luther wasn’t necessarily a natural pick. The middle-aged theology professor was known to be loud, argumentative, and …

10 Steps of Glycolysis

Glycolysis literally means "splitting sugars" and is the process of releasing energy within sugars. In glycolysis, glucose (a six carbon sugar) is …

Extreme Sports

The decline of Holland: how Dutch are doomed by total obsession with past | Priya Ramesh

Nostalgia, arrogance and an insular group of legends turned coaches have stalled the once potent Oranje Machine and results and style have suffered<p>In Graham Swift’s novel Waterland his narrator, a history teacher going through a mid-life crisis, says: “And where history does not undermine and set …

Midlife Crisis

Severe Liver Damage Case Study Shows The Dangers of Naturopathy

Natural isn't always best.<p>One for the medical text books; a 38-year-old male with gallstones presents with dark urine and loss of appetite, and after …

How to make the ultimate roast potato

Forget the turkey and stuffing, the pigs in blankets and the cranberry sauce.<p>Isn't the best part of a Christmas lunch, in fact any roast, the humble potato, fluffy and piping on the inside and roasted to crunchy perfection on the outside?<p>Here's a fool-proof recipe for delicious, crunchy roast …

Blood groups beyond A, B and O: what are they and do they matter?

<i>This week we’re running a series in collaboration with the Australian Red Cross Blood Service looking at blood: what it actually does, why we need</i> …

The world's top 20 city skylines

<b>(CNN) —</b> If you're a regular CNN reader you'll know we love the inner workings of city life.<p>Rowdy food courts, thumping nightclubs, a tranquil art gallery ... these things are the lifeblood of any major metropolis. But sometimes you have to step back to appreciate things from afar.<p>We've put together …

Want to Make a Lie Seem True? Say It Again. And Again. And Again

You only use 10 percent of your brain. Eating carrots improves your eyesight. Vitamin C cures the common cold. Crime in the United States is at an …

Critical Thinking

The World's Largest Fully Steerable Telescope

Michael Holstine<br>Business Manager<br>NRAO, Green Bank Site<br>The GBT is the largest fully-steerable radio telescope on the planet, it's one of the largest moving structures on land, it stands 485 feet above ground level, which makes it taller than the Statue of Liberty. Weighs almost 17 million pound, so …