Biology News
Immunology: In the right place at the right time -
Regulatory T cells help to prevent autoimmune responses. A new imaging technique reveals that activation of these cells requires clustering with self-reactive effector T cells and sensing of the signalling protein interleukin-2. The T cells of our ...

T cells -
Harnessing the antitumour activities of CD8+ T cells to treat cancer is often limited by tolerogenic processes that occur in the tumour microenvironment and restrain T cell function. Reporting in the Journal of Experimental Medicine, Restifo and ...

Molecular biology: Marked progress -
Identifying breast-cancer biomarkers — molecules that can identify the pre-cancerous cells that are likely to progress to invasive cancer — could lead to better-informed decisions about treatment. Unfortunately, little is known about the natural ...

Cells Alive

Florida, Texas - United States

During development from stem to fully differentiated, cells in the body alternately divide (mitosis) and "appear" to be resting (interphase). This sequence of activities exhibited by cells is called the cell cycle.
Interphase, which appears to the eye to be a resting stage between cell divisions, is actually a period of diverse activities. Those interphase activities are indispensible in making the next mitosis possible.

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This animation demonstrates the stages of mitosis in an animal cell. Use the control buttons in the upper left to run the complete animation. Events during Mitosis Interphase: Cells may appear inactive during this stage, but they are quite the opposite. This is the longest period of the complete cell cycle during which DNA replicates, the centrioles divide, and proteins are actively produced. For a complete description of the events during

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Human neutrophils are constantly produced in the marrow and released into the blood to search for invading pathogens. Apoptosis AnimationAfter only one day, they "commit suicide" and are replaced by younger cells. Beginning with the typical neutrophil shape, the apoptotic neutrophil in the clip above undergoes a series of changes including violent membrane blebbing, called zeiosis, (animation to the right) and fragmentation of DNA creating a vacu

Are Viruses Alive?
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Educational site that discusses what defines life and whether viruses fit into this definition.

Oceans Alive
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Celebrates marine biodiversity and explores ways to help save our oceans.

Gondwana Alive
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Organization promoting biodiversity and working to stem the Sixth Extinction.

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Bio-alive is a life science online video sharing community, and the premier destination to watch and share biology and life science related videos worldwide through the web. Our mission is to promote scientific literacy and web based education by providing a online community for video sharing in all biology and life science related fields. Medical students, doctors, researchers and life scientists can watch and share their favorite videos in the

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Summary of the Out-Of-Africa debate, by Dr. George Johnson.

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Companion site to an American Museum of Natural History exhibition with a variety of information about butterflies.

Africa Alive - African Animal Adventure
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A walking safari set in 100 acres. There are plenty of areas around the park where you can sit and have your picnic; we also have a dedicated picnic area for our guests to use if they prefer to eat under cover.

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Non-profit organization dedicated to the worldwide protection of the polar bear and its arctic habitat.