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Biology Explained

What’s on the Y Chromosome Handed Down From Father to Son?

What’s on the Y Chromosome Handed Down From Father to Son?

What’s on the Y Chromosome Handed Down From...

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.

Bodily Functions Explained: Spicy Food Reaction

Bodily Functions Explained: Spicy Food Reaction

Bodily Functions Explained: Spicy Food Reaction

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.

Flashback:  The First ECG

Flashback: The First ECG

Flashback: The First ECG

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....

The Great Migration: Tracking Immune Cells’ Travels

The Great Migration: Tracking Immune Cells’ Travels

The Great Migration: Tracking Immune Cells’...

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...

3-D Molecules Move into the Fast Lane

3-D Molecules Move into the Fast Lane

3-D Molecules Move into the Fast Lane

Thanks to computational and structural biology, we can create 3-D models of the biological “locks” and “keys” that may lead to breakthrough medicines.

Bodily Functions Explained: Goosebumps

Bodily Functions Explained: Goosebumps

Bodily Functions Explained: Goosebumps

A holdover from our prehistoric days, goosebumps are the end result of an adrenaline rush meant to ward off a big chill — or predators.

Science Fact or Science Fiction? We Only Use 10% Of Our Brains

Science Fact or Science Fiction? We Only Use 10% Of Our Brains

Science Fact or Science Fiction? We Only Use 10...

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. 

Science Fact or Science Fiction? Exercise Is Bad for Arthritis

Science Fact or Science Fiction? Exercise Is Bad for Arthritis

Science Fact or Science Fiction? Exercise Is...

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.

Bodily Functions Explained: Itch and Scratch

Bodily Functions Explained: Itch and Scratch

Bodily Functions Explained: Itch and Scratch

Meant to remove invaders, either infectious or simply irritating, a scratch is human skin’s first line of defense.

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