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image: Sketching out Cell Theory, circa 1837

Sketching out Cell Theory, circa 1837

By | August 1, 2013

How a dinner-table conversation between two biologists led to the formulation of the theory that cells are the building blocks of all living organisms.


image: Smoke Detectors

Smoke Detectors

By | August 1, 2013

Ancient receptors in seeds bind a small molecule in smoke that promotes germination.

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image: Week in Review, July 22–26

Week in Review, July 22–26

By | July 26, 2013

Faux stem cells; X chromosome involved in sperm production; rewarding peer review; clues to flatworm regeneration; an ethereal glow signals death


image: A Wild Stem Cell Chase

A Wild Stem Cell Chase

By | July 24, 2013

A rigorous new study provides strong evidence that very small embryonic-like stem cells hypothesized to be found in mice and humans do not exist.

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image: Dying Worms Emit Ethereal Glow

Dying Worms Emit Ethereal Glow

By | July 24, 2013

A head-to-tail wave of blue fluorescence signals the death of a nematode worm.

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image: Gene Therapy Coming of Age?

Gene Therapy Coming of Age?

By | July 11, 2013

Using lentiviral vectors to replace mutated genes in blood stem cells, scientists successfully treat two rare diseases apparently without causing harmful side effects.


image: The Downside of Antibiotics?

The Downside of Antibiotics?

By | July 3, 2013

Bacteria-killing antibiotics might also damage a person’s tissues.


image: Temperature-Sensing Fat Cells

Temperature-Sensing Fat Cells

By | July 1, 2013

Researchers discover that unlike brown fat cells, white fat cells can directly sense cooling temperatures to switch on genes that control heat production.

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image: Capsule Reviews

Capsule Reviews

By | July 1, 2013

Denial, Probably Approximately Correct, Permanent Present Tense, and Against Their Will


image: Opinion: On Living Longer

Opinion: On Living Longer

By | June 24, 2013

Memory loss in healthy older adults is on the rise, as are preventive treatments—but there is little evidence that these remedies are effective.



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