<p><b>A <i>Guardian </i>Book of the Week</b><br><b>Longlisted for the PEN / E. O. Wilson Literary Science Writing Award<br><br>An award-winning physician and scientist makes the game-changing case that genetic females are stronger than males at every stage of life</b><br><br>Here are some facts: Women live longer than men. They have stronger immune systems. They''re better at fighting cancer and surviving famine, and even see the world in a wider variety of colors. They are simply stronger than men at every stage of life. Why is this? And why are we taught the opposite?<br><br>To find out, Dr. Sharon Moalem drew on his own medical experiences - treating premature babies in the neonatal intensive care unit; recruiting the elderly for neurogenetic studies; tending to HIV-positive orphans in Thailand - and tried to understand why in every instance men were consistently less likely to thrive. The answer, he discovered, lies in our genetics: two X chromosomes offer a powerful survival advan