Among the many things parents hand down to their children are 23 pairs of chromosomes – those thread-like structures in the nucleus of every cell containing the genetic instructions for every person. Here’s a look at the Y chromosome and the role it plays in deciphering ancestry.
Spicy food contains chemicals that trick the body into cranking up its internal air-conditioning system, triggering responses from head to toe and involving everything from the respiratory to the circulatory system.
Willem Einthoven found the beat and built a machine that could measure the electrical current a heart creates. It weighed 600 pounds. An electrocardiogram — called informally an ECG or EKG — measures the small electric waves that a human heart creates. It’s been doing it for more than a century....
Our immune cells, in particular, are always on the move, constantly patrolling the body for foreign invaders. For reasons that scientists don’t fully understand, the immune system sometimes becomes confused, sending a fleet of fighters to attack the body’s own tissues and organs. The result...
A long held science myth is the claim that we “only use 10 percent of our brains.” “It’s a misunderstanding of how the human brain, or any mammalian brain for that matter, works,” says Tarek Samad, Head of Neurodegeneration Research at Pfizer’s Kendall Square Reseach site.
When it comes to the link between exercise and arthritis, the evidence from a wide range of studies strongly suggests that exercise not only improves function among people with arthritis but also helps them control pain better.