A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
Category Archives: Science
Covid-19: ‘Why Variants Are Spreading Faster’
As highly transmissible coronavirus variants sweep across the world, scientists are racing to understand why these new versions of the virus are spreading faster, and what this could mean for vaccine efforts. New research says the key may be the spike protein, which gives the coronavirus its unmistakable shape. Illustration: Nick Collingwood/WSJ
Medicine: Scientists Grow ‘Mini-Organs’ To Repair Damaged Human Livers
Scientists have used a technique to grow bile duct organoids – often referred to as ‘mini-organs’ – in the lab and shown that these can be used to repair damaged human livers. This is the first time that the technique has been used on human organs. Funding provided by European Research Council, the National Institute for Health Research and the Academy of Medical Sciences
Science Podcast: Covid Questions Answered, Rocky Planet Formation
Science Staff Writer Jon Cohen joins host Sarah Crespi to take on some of big questions about the COVID-19 vaccines, such as: Do they stop transmission? Will we need boosters? When will life get back to “normal.”
Sarah also talks with Anders Johansen, professor of planetary sciences and planet formation at the University of Copenhagen, about his Science Advances paper on a new theory for the formation of rocky planets in our Solar System. Instead of emerging out of ever-larger collisions of protoplanets, the new idea is that terrestrial planets like Earth and Mars formed from the buildup of many small pebbles.
TOP JOURNALS: RESEARCH HIGHLIGHTS FROM SCIENCE MAGAZINE (FEB 19, 2021)
Science Podcast: Million-Year-Old Mammoth DNA, Art In Science & Jupiter
Researchers sequence the oldest DNA ever recovered, and the people bringing art and science together.
In this episode:
00:46 Million-year-old mammoth DNA
This week, researchers have smashed a long-standing record by sequencing a genome that’s over a million years old. They achieved this feat by extracting DNA from permafrost-preserved mammoth teeth, using it to build-up a more detailed family tree for these ancient animals.
Research Article: van der Valk et al.
News: Million-year-old mammoth genomes shatter record for oldest ancient DNA
News and Views: Million-year-old DNA provides a glimpse of mammoth evolution
10:00 Research Highlights
A spacecraft catches a rare glimpse of a rock smashing into Jupiter, and the perilous state of sawfish populations.
Research Highlight: Robotic eyes spy the flash of a meteor on Jupiter
Research Highlight: Humans push a hulking fish with a chainsaw nose towards oblivion
12:18 Putting art into science (and science into art)
Art and science are sometimes considered disparate, but when brought together the results can be greater than the sum of their parts. This week we hear from an artist and a scientist on the benefits they found when crossing the divide.
Career Feature: How to shape a productive scientist–artist collaboration
Career Feature: How the arts can help you to craft a successful research career
Where I work: ‘All my art is curiosity-driven’: the garden studio where art and physics collide
21:43 Briefing Chat
We discuss some highlights from the Nature Briefing. This time, a neanderthal gene makes brain-like organoids bumpy, and uncovering the original location of Stonehenge’s stone circle.
Medical Research: ‘Next Generation Vaccines’
Vaccine science and technology is advancing. Next generation vaccines could change how we combat infectious diseases, and it’s important to understand how the technology works.
Video: ‘How Covid-19 Vaccines Are Tested’
Vaccines are rigorously studied and tested — but there are challenges along the way.
Covid-19: Penn Medicine Explains mRNA Vaccines
Vaccines are about to change the world…again. mRNA Vaccines are currently being used to battle COVID-19, and have the potential to eradicate diseases like HIV, herpes, sickle cell anemia, and even cancer. Learn how the vaccines work and where the technology could be headed in this explainer video.
Currently, the Pfizer-BioNTech and Moderna vaccines for COVID-19 use the mRNA technology developed at Penn by infectious disease expert Drew Weissman, MD, PhD, along with longtime research collaborator Katalin Karikó, PhD, an adjunct associate professor. Dr. Weissman has been studying mRNA vaccines for decades. This technology could change the way future vaccines are made to prevent countless other diseases.
Science Podcast: Africa’s Great Green Wall, Whale Songs Image Ocean Floor
Science journalist Rachel Cernansky joins host Sarah Crespi to talk about progress on Africa’s Great Green Wall project and the important difference between planting and growing a tree.
Sarah also talks with Václav Kuna, a postdoctoral researcher at the Institute of Geophysics of the Czech Academy of Sciences, about using loud and long songs from fin whales to image structures under the ocean floor.
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