Overview

• A new study in Nature Astronomy concludes there is a 50% probability that the Milky Way will collide with Andromeda in the next 10 billion years after accounting for gravitational influences from the Large Magellanic Cloud and Triangulum galaxy.
• Ancient DNA analysis of 21 individuals uncovers a previously unknown hunter-gatherer culture on Colombia’s Bogotá Altiplano that vanished around 2,000 years ago.
• Shotgun sequencing of Dublin’s air samples detects environmental DNA from humans, pathogens and substances such as opium poppy, cannabis and psilocybe mushrooms.
• Field observations in German orchards document Caenorhabditis nematodes forming natural towers for the first time, a behavior that appears to help them hitch rides on passing animals.
• Fossil fragments from Devon Island in Nunavut identify Onychodus mikijuk, a new onychodontid fish species from a 370-million-year-old riverine environment and one of the youngest known occurrences of its clade.