kafkaintherun
who tells the birds where to fly?
Category: Science
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Your PCR test is negative, so why are you still exhausted? A new review suggests COVID may wake up viruses and TB that have been hiding in your body for years.
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We humans have come this far by surviving many kinds of catastrophe over our evolution. Having split from the common ancestor we share with the other primates, the apes, nearly 5 million years ago, we are very new compared with many other species in nature. We became modern humans by enduring the genetic bottleneck caused…
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हामी मानव प्रजाति आफ्नो विकाश क्रममा धेरै खाले विनाशहरूको सामना गर्दै यहाँसम्म आइपुगेका हौँ। प्राइमेट, बाँदरहरूको सह-पुर्खाबाट झन्डै ५० लाख वर्षअघि छुटेका हामी प्रकृतिका अन्य कतिपय प्रजातिको तुलनामा धेरै नयाँ छौँ। टोबा ज्वालामुखी र जलवायुको परिवर्तनको आनुवंशिक (जेनेटिक) बोटलनेक, हिमयुगको कठोरता र अनेक भौगोलिक असुविधा र सिमानाहरू सामना गर्दै हामी आधुनिक मानिस बनेका हौँ। हाम्रो…
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Your immune system can’t tell a life-saving kidney from an invader. Here’s why transplant patients take immune suppressants for life, and why one rare side effect doesn’t justify a sweeping claim
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Even though large animals like elephants have billions of cells, cancer is rare in them, while in humans its risk is notably higher. What could be the reason? Let us be clear from the start: the evolutionary reasons behind the different cancer-resistance capacities of elephants and humans, along with differences in genetic diversity, have shaped…
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क्यान्सरलाई लामो समयसम्म कोष (सेल) हरूमा हुने उत्परिवर्तन (म्युटेसन) को कारणले हुने समस्या भनेर बुझिन्थ्यो। प्रत्येक कोषमा हुने डिएनएको उत्परिवर्तन क्रमशः सँगालिँदै जाँदा क्यान्सर लगाउन सक्ने ट्युमर बन्ने सम्भावना हुन्छ। त्यस हिसाबले, जति धेरै कोष भएको प्राणी, त्यति धेरै क्यान्सर हुनुपर्ने हो। तर वास्तविकता उल्टो छ: मुसालगायत साना प्राणीहरू र ठूला जस्तै हात्ती र ह्वेलजस्ता…
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A major breakthrough from Spain’s CNIO claims to cure pancreatic cancer in mice. This analysis explains the ‘triple blockade’ science and why the road to human trials is still long and risky. Read the full reality check.
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Five years after the pandemic began, a haunting question remains: Why do millions suffer long after the virus has cleared? A compelling new hypothesis suggests that SARS-CoV-2 acts as a master key, unlocking ancient viruses, latent bacteria, and genetic “ghosts” that have been hiding within us all along.
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Lobsters exhibit negligible senescence, defying the decay that defines human aging. Yet their secret- unrestricted telomerase- reveals a fatal paradox: the same fuel for their longevity acts as a driver for cancer in our complex bodies. Aging is an unavoidable cost of multicellularity- a compromise evolution made to maintain order among trillions of cells.
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From the collapsed dynasties of ancient Egypt to the hemophilia of Victorian Europe, the human quest for “lineage purity” has come at a devastating biological cost. This article explores how endogamy and consanguineous marriage have acted as a “genetic prison,” narrowing our diversity and exposing us to hereditary diseases- and why breaking these ancient walls…
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There are viral ghosts within us, lurking in our DNA. Transposons or Jumping genes are remnants of ancient retroviral infections. Almost half of our genome is made up of these viral DNA that has made its home in our Genome. They can form “dark antigens”- hidden viral proteins that evade immune detection and this biological…
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All eels on earth begin their life at Saragossa Sea, a small patch of Atlantic Ocean near Bermuda Triangle. How a river-dwelling fish is tied to an oceanic cradle millions of years older than humanity.
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नीहरूले लिएको त्यो ‘फोटो ५१’ चाहिँ डीएनए ‘बी-रूप’ को थियो। सन् १९५२, मे २ मा रोजालिन्ड र गोस्लिङले झन्डै ६० घण्टा लगाएर सो फोटो खिचेका थिए। त्यति बेला फोटो लिएपछि खासै ‘युरेका मोमेन्ट’ केही भएको थिएन, अरूहरूले पनि देखेका थिएनन्। उनीहरू पनि त्यसपछि, डीएनएको ‘बी-रूप’ भन्दा बढी भेटिने ‘ए-रूप’ को खोजी गर्न व्यस्त भए। उनीहरू…
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The photo Wilkins showed Watson on the afternoon of January 30, 1953, is what we now know as ‘Photo 51’. Though it might seem ordinary now, many things were hidden within the ‘X’ shape and the ‘streaks’ visible in Rosalind’s ‘Photo 51’. Based on that ‘Photo 51’, Watson-Crick resumed their DNA structure research two days…
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who tells the birds where to fly?
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