Many large mammals have lost genetic diversity, often thanks to the actions of people shrinking their populations. The implications can be severe because without genetic diversity, a population does not have a “genetic database” to fall back on to adapt to environmental change. The Iberian lynx (Lynx pardinus) is no stranger to this reduction in […]
Author: Ramón Muñoz-Chápuli has been Professor of Animal Biology in the University of Málaga until his retirement. He has investigated for forty years in the fields of developmental biology and animal evolution. Lungfish (Dipnoi) are fascinating animals. Despite having gills, they can breathe atmospheric air thanks to a pair of lungs. Their geographic distribution aligns […]
Chromatin is a complex of DNA and histone, a protein, in the nucleus of a cell. One of the main functions of chromatin is to help DNA packing. Cellular phenotypic heterogeneity is a key determinant of many biological functions; yet, it is still not clear whether it stems from the modifications of the chromatin structure […]
Author: Ramón Muñoz-Chápuli has been Professor of Animal Biology in the University of Málaga until his retirement. He has investigated for forty years in the fields of developmental biology and animal evolution. Nematode worms may not be very popular, but what we know about their abundance is astonishing. After arthropods, chordates, and molluscs, they constitute […]
A new imaging technique can give scientists a much closer look at fibril assemblies, stacks of peptides like amyloid beta, most notably associated with Alzheimer’s disease. These cross-β fibril assemblies are also useful building blocks within designer biomaterials for medical applications, but their resemblance to their amyloid beta cousins, whose tangles are a symptom of […]
Author: Ramón Muñoz-Chápuli has been Professor of Animal Biology in the University of Málaga until his retirement. He has investigated for forty years in the fields of developmental biology and animal evolution. Parasitism is very common among invertebrates, but much less so among vertebrates. The case of lampreys is well known. They attach to the […]
When we say that someone is black or white, we may think that he or she belongs to a biological category defined by his or her color. Many people believe that skin pigmentation reflects belonging to a race, “one of the main groups that humans can be divided into according to their physical differences, for […]
Just over five years ago, on 22 February 2019, an unmanned space probe was placed in orbit around the Moon. Named Beresheet and built by SpaceIL and Israel Aerospace Industries, it was intended to be the first private spacecraft to perform a soft landing. Among the probe’s payload were tardigrades, renowned for their ability to […]
Inside the cells of breathing organisms –microorganisms, fungi, plants and animals– a cyclically configured sequence of chemical reactions transfers the energy provided by the organic substances –based on carbon chains– incorporated in the food into ATP molecules. This process, which we call the Krebs cycle, starts with acetyl coenzyme A (or acetyl-CoA), a derivative of […]
Source: Zhang et al. (2023) Despite their importance in our daily lives, we do not give much importance to our hands or feet, and even less at how they came to be. Even if roughly known, the process of human limb development had never been observed at single cell level resolution. Recently, Sarah Teichmann and […]