Lifeboat Foundation: Safeguarding Humanity
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Blog – Page 4140

T cells aren’t the first immune forces on the scene, they arrive after being alerted by other immune system warriors that a microbe has invaded or a cancer has silently seeded.

Exactly how T cells obtain the energy they need to build a massive army in the face of infiltrators has been the subject of speculation, theory and decades-long laboratory inquiries.

Now, scientists are taking a deeper dive into the question, and their investigations are shedding new light on an array of dynamic biological activities that help bolster T cell populations. Their research demystifies how T cells can power their growth and proliferation when disease emerges and T cell strength is in greatest need.

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Human microproteins encoded by small ORFs have been found to be functional. By comparing the corresponding sequences across vertebrate genomes, Vakirlis et al. show that a number of these originated “from scratch” from noncoding sequences, including two very recent cases unique to humans. These cases demonstrate the rapid evolution of genetic novelty.

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WASHINGTON (AP) — Now you see them, now you don’t.

Some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday in the journal Science.

During the day, these nocturnal frogs sleep by hanging underneath tree leaves. Their delicate, greenish transparent forms don’t cast shadows, rendering them almost invisible to birds and other predators passing overhead or underneath.

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NGC 1,566 is a rare bird among galaxies: Gas and dust are still falling into the supermassive black hole at its center, fueling powerful outbursts of radiation that, in shorter wavelengths of light, make the galaxy’s center blaze brighter than all the rest of its stars combined.

Of the thousands of galaxies astronomers have found, cataloged, and studied so far — and the tens of billions in the universe — only about 10 percent have actively-feasting supermassive black holes at their centers. And NGC 1,566 is the second-brightest of these. At 40 million light years from Earth, it’s also one of the closest, making it a prime target for astronomers.

Hubble’s Wide Field Camera captured a near-infrared view of NGC 1,566 back in 2014, which revealed long, swirling arms ablaze with stars and laced with dark strands of interstellar dust. Even in visible and near-infrared light, the galaxy’s core is bright.

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