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

Micro Manipulators

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Cartoon of a doctor performing a check-up on an old tree holding a wooden cane.

Ten Minute Sabbatical

Crossword Puzzle

Illustration of two locks; one being unlocked.

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Opinion: The Promise and Plight of Open Data

News

Lymantria&nbsp;species make ultrasonic, mechanical rasping noises when they hear bats nearby.&nbsp;

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Lymantria&nbsp;species make ultrasonic, mechanical rasping noises when they hear bats nearby.

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The garden tiger moth (Arctia caja) produces ultrasonic clicks in response to bats.&nbsp;

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Many Moths Speak Up to Ward Off Bats

Feature

Ecology professor George H. La Roi&rsquo;s data&mdash;collected over 35 years of studying North American boreal forests and stored in notebooks, CD-ROMs, and slides&mdash;are now preserved by the Living Data Project.

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Cartoon of people searching for data through books and a computer screen.

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Inside the Project Trying to Save Datasets from Extinction

Illustration showing how some intracellular bacteria, such as&nbsp;Listeria monocytogenes, use the host cell&rsquo;s actin supplies to build their own transport system

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Illustration showing how some intracellular bacteria, such as Legionella pneumophila, manipulate the cell&#39;s membranes for their own good

Cross section of an organic cell with intracellular organelles

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Illustration showing how Mycobacterium leprae, which causes leprosy, takes cell reprogramming to an extreme by reverting its Schwann cell host into a stem cell&ndash;like state

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Renderings of listeria monocytogenes and chlamydia trachomatis

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How Intracellular Bacteria Hijack Your Cells

Illustration showing how some intracellular bacteria, such as Listeria monocytogenes, use the host cell&rsquo;s actin supplies to build their own transport system, while others, such as&nbsp;Legionella pneumophila, manipulate the cell&#39;s membranes for their own good

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Illustration showing how Mycobacterium leprae, which causes leprosy, takes cell reprogramming to an extreme by reverting its Schwann cell host into a stem cell&ndash;like state

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Illustration showing how some intracellular bacteria, such as Listeria monocytogenes, use the host cell&rsquo;s actin supplies to build their own transport system

Illustration showing how some intracellular bacteria, such as Legionella pneumophila, manipulate the cell&#39;s membranes for their own good

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Infographic: Intracellular Bacteria&rsquo;s Tricks for Host Manipulation&nbsp;

Infographic

A live-cell image depicting optineurin (yellow) as it wraps around a damaged mitochondrion to pinch it off from the mitochondrial network (shown in pink).&nbsp;

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Chantell Evans Tracks Mitochondrial Cleanup in Neurons

Profile

Diagram of the causes of mortality in the army in the east.

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A circular, rose-like diagram illustrating that deaths of soldiers during the Crimean War were mostly caused by disease, rather than combat. A zoom on the left side of the page shows how sanitation reform at a hospital in 1855 reduced needless deaths.&nbsp;

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Diagrammatic War, 1858

Foundations

Intracellular bacteria that hijack host cells have much to teach us about biology