Caecilians are limbless amphibians that can be easily mistaken for snakes. Though caecilians are only distantly related to their reptilian cousins, researchers in a study appearing July 3 in the journal iScience describe specialized glands found along the teeth of the ringed caecilian (Siphonops annulatus), which have the same biological origin and possibly similar function to the venom glands of snakes. As such, caecilians may represent the oldest land-dwelling vertebrate animal with oral venom glands.
In a new study in rotifers (microscopic invertebrates), scientists tested the evolutionary fitness of older-mother offspring in several real and simulated environments, including laboratory culture, under threat of predation in the wild, or with reduced food supply. They confirmed that this effect of older maternal age, called maternal effect senescence, does reduce evolutionary fitness of the offspring in all environments, primarily through reduced fertility during their peak reproductive period. They also suggest an evolutionary mechanism for why this may occur.
Incarceration and police discrimination may contribute to HIV, depression and anxiety among Black gay, bisexual and other sexual minority men, according to a Rutgers led study.
How old is your tail-wagging bundle of joy in human years? According to the well-known "rule of paw," one dog year is the equivalent of 7 years. Now, in a study published July 2, in the journal Cell Systems, scientists say it's wrong. Dogs are much older than we think, and researchers devised a more accurate formula to calculate a dog's age based on the chemical changes in the DNA as organisms grow old.
Cyanobacteria hardly need any nutrients and use the energy of sunlight. Bathers are familiar with these microorganisms as they often occur in waters. A group of researchers at the Karlsruhe Institute of Technology (KIT) has discovered that the multicellular species Phormidium lacuna can be genetically modified by natural transformation and could thus produce substances such as ethanol or hydrogen. They present their results in the online scientific journal PLOS ONE (DOI: 10.1371/journal.pone. 0234440).
New research from The University of Queensland has found that women who have hot flushes and night sweats after menopause are 70 per cent more likely to have heart attacks, angina and strokes.
A study released today in STEM CELLS outlines a new platform researchers designed that allowed them to investigate the potentially harmful effects of microplastics and nanoplastics.
In a new meta-study, experts from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) have published ground-breaking findings on the effects of climate change for fish stock around the globe.
Motile sperm are difficult to collect with a conventional cell sorter because they are vulnerable to physical damage. A Japanese research collaboration has developed a technique using a cell sorter with microfluidic chip technology to reduce cell damage and improve in vitro fertilization rates. This research is expected to increase in vitro fertilization rates to improve production of experimental animals and livestock, and could be used as a fertility treatment in reproductive medicine.
Women who experience high blood pressure during pregnancy are more likely to develop heart disease and heart failure in later life, according to an international team of researchers.