Lifeboat Foundation

Scientists at the National Synchrotron Light Source II (NSLS-II)—a U.S. Department of Energy (DOE) Office of Science User Facility at DOE’s Brookhaven National Laboratory—have used ultrabright x-rays to image single bacteria with higher spatial resolution than ever before. Their work, published in Scientific Reports, demonstrates an X-ray imaging technique, called X-ray fluorescence microscopy (XRF), as an effective approach to produce 3D images of small biological samples.

An interview with Drs. Leonid Gavrilov and Natalia Gavrilova on the demography of life extension.

Many people are concerned that vastly extended healthy lifespan might lead us to catastrophic overpopulation, and the best way to mitigate this fear is probably to talk to an experienced demographer. To learn more about this and other interesting questions related to life extension, we spoke to Drs. Leonid Gavrilov and Natalia Gavrilova, respectively Principal Investigator and Research Associate at the Center on Aging in Chicago University. Both of them have specialized in the biodemography of aging and longevity and possess nearly endless resumes.

Natalia and Leonid, your field of expertise is the biodemography of aging and longevity. What drew you to this field of research?

Continue reading “An Interview With Leonid Gavrilov And Natalia Gavrilova” »

Miniature devices for sensing biological molecules could be developed quicker thanks to a rapid prototyping method.

We all start out as a clump of identical cells. As these cells divide and multiply, they gradually take on distinct identities, acquiring the traits necessary to form, for instance, muscle tissue, bone, or nerves. A recent study from Rockefeller scientists offers new insight into how these cellular identities are cultivated over the course of development.

According to the study, published in eLife, cells retain a memory of the chemical signals to which they are exposed. And, the researchers show, embryos that fail to form these memories remain a clump of clones, never realizing their unique biological potential.

What is life?

That fundamental question fascinated Babette Babich, Ph.D., professor of philosophy, when she was an undergraduate student, so she majored in biology.

But the answer she was looking for was not to be found in the natural sciences. Instead, she discovered it in the dense texts of Friedrich Nietzsche and Martin Heidegger, philosophers whose ideas about life fueled her desire to explore that critical question.

Continue reading “Philosophy Professor Sees ‘Plato’s Cave’ in Today’s Technologies” »

A new study by Calico found that our genes determine our lifespan much less than previously accepted and lifespan heritability is less than seven percent.

Although long life tends to run in families, genetics has far less influence on life span than previously thought, according to a new analysis of an aggregated set of family trees of more than 400 million people. The results suggest that the heritability of life span is well below past estimates, which failed to account for our tendency to select partners with similar traits to our own. The research, from Calico Life Sciences and Ancestry, was published in Genetics.

“We can potentially learn many things about the biology of aging from human genetics, but if the heritability of life span is low, it tempers our expectations about what types of things we can learn and how easy it will be,” says lead author Graham Ruby. “It helps contextualize the questions that scientists studying aging can effectively ask.”

Continue reading “Family tree of 400 million people shows genetics has limited influence on longevity” »

From conquering death to automatic insulin deliveries, we will be able to finetune our biology to a once-unthinkable degree.

Solid-liquid filtration is a ubiquitous process found in industrial and biological systems. Although implementations vary widely, almost all filtration systems are based on a small set of fundamental separation mechanisms, including sieve, cross-flow, hydrosol, and cyclonic separation. Anatomical studies showed that manta rays have a highly specialized filter-feeding apparatus that does not resemble previously described filtration systems. We examined the fluid flow around the manta filter-feeding apparatus using a combination of physical modeling and computational fluid dynamics. Our results indicate that manta rays use a unique solid-fluid separation mechanism in which direct interception of particles with wing-like structures causes particles to “ricochet” away from the filter pores. This filtration mechanism separates particles smaller than the pore size, allows high flow rates, and resists clogging.

Several fundamental mechanisms for solid-fluid separation have been described in the biological and engineering literature, including sieve (1, 2), cross-flow (3–6), hydrosol , and cyclonic separation. Sieve filtration passes a mixture of particles and fluid through a structure with regularly sized pores, causing the particles to be retained while the fluid is drained. Although effective, sieve filters must have pore sizes smaller than the particle size, and they inevitably clog in use (2, 8, 9). Cross-flow filtration is similar to sieving, except that the incoming flow runs parallel rather than perpendicular to the filter. This configuration shears captured particles off the filter’s surface, which reduces but does not eliminate clogging (5, 6). Unlike sieve and cross-flow filters, hydrosol and cyclonic filtration do not require regularly sized pores.

A recent experiment may have placed living organisms in a state of quantum entanglement.

• By Jonathan O’Callaghan on October 29, 2018