Maternal secrets of our earliest ancestors unlocked
Mon, 15 Jul 2019 11:42:41 EDT
New research brings to light for the first time the evolution of maternal roles and parenting responsibilities in one of our oldest evolutionary ancestors. Australopithecus africanus mothers breastfed their infants for the first 12 months after birth, and continued to supplement their diets with breastmilk during periods of food shortage. Tooth chemistry analyses enable scientists to 'read' more than two-million-year-old teeth. Finding demonstrates why early human ancestors had fewer offspring and extended parenting role.
New virus found in one-third of all countries may have coevolved with human lineage
Thu, 11 Jul 2019 14:14:15 EDT
A new study has investigated the origin and evolution of a virus called crAssphage, which may have coevolved with human lineage.
Ancient epigenetic changes silence cancer-linked genes
Thu, 11 Jul 2019 10:56:45 EDT
A study in zebrafish indicates that some genes linked to cancers in humans have been strictly regulated throughout evolution.
High mutation rates within huge, old-growth trees
Mon, 08 Jul 2019 17:24:09 EDT
Scientists found the first evidence of the tremendous genetic variation that can accumulate in some of our tallest trees. They found that an old-growth Sitka spruce could have up to 100,000 genetic differences in DNA sequence between the base of the tree and the tip of the crown.
Tracing the roots: Mapping a vegetable family tree for better food
Mon, 08 Jul 2019 15:41:06 EDT
Scientists have challenged prior theories of the origins of three vegetables -- canola, rutabaga and Siberian kale -- by mapping the genetic family tree of these leafy greens.