A report on the Covid-19 pandemic as of 19:00 GMT on Friday, 10 July 2020.
Plants are green because photosynthesis is optimized – not to maximize energy, but to minimize stress.
Life runs on a universal workforce: the proteins which build and maintain cells. Despite vast diversity, regardless of life form, the jobs proteins do are […]
The global success of CoV-2 owes to its asymptomatic infectiousness. Whereas the specific source of V2’s superlative furtiveness remains a mystery, virologists now have a handle on its high hit rate.
Communications between a cell’s energizer – mitochondria – and its recycler – lysosomes – regulate cell senescence.
The onset of organelles by eukaryotes seemed such an innovation over the apparent pandemonium in prokaryotes lacking organizational membranes. Look closer and cells run tidy businesses whether inside or outside protein fortresses.
Cyanobacteria originated photosynthesis and were innovators in using cellular greenhouses to do so. They also evolved the ability to flexibly capture whatever light was available to them – an adaptive optimality that changed the world.
For many animals, sleep is essential for healthy functioning; so too for T cells, warriors of the adaptive immune system.
Sentient macromolecules – proteins – comprise the labor force of cells. The mercurial among them are enzymes, which catalyze chemical reactions to accelerate manufacture of bioproducts.
In deciding the timing of dividing, mother cells smartly sense their environment and direct their daughters on the right move.
The human respiratory tract hosts a diverse community of cocirculating viruses: some of which benignly reside, whereas others aim at acute infections. Interactions between these viruses alter the risk of sickness.
Virus may lack the machinery to replicate themselves, but they do direct their assembly. Their craftsmanship is exquisite.
Pathogenic bacteria live by the motto espoused by German philosopher Fredrich Nietzsche (1844-1900): “what does not kill me makes me stronger.”
Cellulose is the most abundant organic compound on Earth, having gained that distinction from being the substance by which plants propel themselves skyward.
Influenza outbreaks are often seasonal – but their seasons vary. Whether Covid-19 has a season is uncertain.
Cells spawn copies of themselves in the process called mitosis. A crucial process within mitosis is genetic (chromosomal) replication.
Immune system cells flock to the site of an infection once residents there cry out for relief. The herding causes inflammation: swelling, redness, and pain. Then the immunizers collectively decide what to do.
Viruses travel light. While hardy enough to survive the elements, they enjoy the comfort of being indoors.
Cancer cells know they’re bad. Determined to raise hell, cancer cells furtively propagate through the body.
Endosomes are the containers cells use to transport materials for use within a cell or disposal. Endosomes exemplify the tidiness and intelligence which cells have.
Seed germination illustrates that vital energy is the essentiality of life.
Life on Earth emerged many times. Cells of several sorts arose, their chemistry and structures confined to certain parameters of potentiality. The possibilities were delimited by efficiencies and data facility. Indeed, information has always been the defining feature of life, as has been sharing.
Enterprising microbes paved the way for large life on land by breaking bedrock into bits.
Bacterial marauders of animals slyly ply their craft.
Mitochondria are a cell’s power source. This organelle is also pivotal in the cell life cycle. There are multiple signaling pathways between a mitochondrion and various organelles.