An abstract illustration of a tooth on a bluish background, signifying teeth that are a source of multipotent dental stem cells that can have therapeutic applications in dental diseases and beyond.

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Stem cells in the teeth and gums are multipotent and easily accessible. Scientists are researching ways to harness their power for therapies beyond dentistry.

Dental Stem Cells Regenerate More Than Just Smiles

The liquid world of fetal development provides a rich source of nutrition and protection tailored to meet the needs of the growing fetus. 

Illustration of a developing fetus surrounded by a clear fluid with a subtle yellow tinge, representing amniotic fluid.

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What Is the Amniotic Fluid Composed of? 

TS Digest

Life on the Ocean Surface

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Ten Minute Sabbatical

Crossword Puzzle

Illustration showing neuston&#39;s microhabitats

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Infographic showing where neuston reside.

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Close-up shot of sea surface with small waves

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Sampling of different neuston species alongside recovered plastic

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The Constellation of Creatures Inhabiting the Ocean Surface

Feature

Illustration showing where neuston reside

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Infographic: Neuston Drift Atop the World&rsquo;s Oceans

Infographic

The Portuguese man-of-war (Physalia physalis)

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This buoy barnacle (Dosima fascicularis)

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The violet sea snail (Janthina janthina)

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The by-the-wind sailor (Velella velella)

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Violet sea snail (Janthina janthina)

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Water skaters (genus Halobates) left, and 
their eggs (the orange specks glued to a piece of plastic in the image at right)

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Slideshow: Meet the Neuston, the Diverse Organisms Living at the Ocean&rsquo;s Surface

Slideshow

Chlamydia invades a host cell, forms a membrane-bound vacuole, or inclusion, and then modifies the protein composition of the structure&rsquo;s membrane. If immune cells detect Chlamydia before it forms the inclusion, they trigger T cells to produce interferon-&gamma; (IFN-&gamma;), a powerful cytokine. IFN-&gamma; activates the protein mysterin (also called RFN213), which attaches ubiquitin to the inclusion membrane, signaling the cell to destroy the inclusion&rsquo;s contents by dumping them into a lysosome (left). C. trachomatis produces GarD, a protein that integrates into the inclusion membrane itself and somehow prevents mysterin from attaching ubiquitin, allowing the bacterium to evade immune destruction while continuing to multiply and eventually bursting from the cell (right).

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How Chlamydia Guards Itself Against the Immune System

News

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Infographic: How Chlamydia Evades Immune Detection

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The genomes of giant viruses often appear far more complex than those of simpler viruses. This Tupanvirus, first discovered in 2018, has the most complete protein-building apparatus of any virus to date, capable of coding for roughly 1,400 proteins.

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Monir Moniruzzaman Studies the Secrets of Giant Viruses

Profile

Book cover of The Phantom God by John C. Wathey

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Opinion: Neuroscience Could Help Demystify Religious Experience

Article

A black-and-white photo of a person&rsquo;s hands holding a black-and-white barred chicken. The feathers of its breast have been pulled back to reveal a large tumor.

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Transmissible Tumors, 1909

Foundations

The myriad species floating atop the world’s seas are complicating efforts to clean up plastic pollution