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“#’Selfish and loveless’ society in Uganda really is not” The Ik society of Uganda, labeled half a century ago as selfish, actually has a culture that encourages sharing with the needy, new study finds. Credit: Cathryn Townsend A mountain people in Uganda—branded as selfish and loveless by an anthropologist half a century ago—really is not,…
“#How does cooperation evolve?” Positive feedbacks favor cooperative bacteria, which are part of a multicellular group (right). In contrast, individual bacterial cells that try to help others (left) do not benefit. Credit: Department of Ecology at the Osnabrueck University In nature, organisms often support each other in order to gain an advantage. However, this kind…
“#The human brain: not just large but finely shaped” Reconstruction of the 3D digital brains and phylogenetic tree of primates. Credit: Gabriele Sansalone Large brains have long differentiated humans and primates from other mammals and there is a clear evidence that brain mass increased through time. Now a new study by the University of New…
“#Did adaptive radiations shape reptile evolution?” Animals sampled in the analysis. Colors indicates rates of evolution: warm colors high rates and cool colors low rates Credit: Tiago R. Simões Some of the most fundamental questions in evolution remain unanswered, such as when and how extremely diverse groups of animals—for example reptiles—first evolved. For seventy-five years,…
“#Hints at jaw evolution found in marsupials and monotremes” Images of the join between the ear bones and upper jaw in the echidna at hatching. The left image shows the cartilages in blue, while the right shows the expression of type II collagen (green) and Sox9 (red), both necessary for cartilage development. Credit: Anthwal et…
“#How Darwin can help us with cancer and coronavirus” The same, but different. Phenotypes are the differences you can observe. Genotypes are the genes behind these differences. We need to understand how they’re linked. Credit: Shutterstock, NTB scanpix Some 160 years after Darwin, we understand how natural selection works. But why don’t all organisms have…
“#Hunting in savanna-like landscapes may have poured jet fuel on brain evolution” The Okavango Delta’s patchy landscape is a good example of the “Goldilocks landscape” where the ability to plan results in a huge survival payoff. Credit: Tim Copeland Ever wonder how land animals like humans evolved to become smarter than their aquatic ancestors? You…