A family tree of sea cows suggests that the dugong traversed an ocean to reach its present habitat.
Builder drones
Ground-based robots have potential for helping in the construction industry, but they are limited by their height. In this week’s issue, Mirko Kovac, Robert Stuart-Smith and their colleagues introduce highly manoeuvrable aerial robots that can perform additive 3D construction tasks. Inspired by natural builders such as wasps and bees, the researchers created BuilDrones (as shown on the cover) that can work in an autonomous team to perform 3D printing tasks using foam- or cement-based materials. They also created ScanDrones to assess the quality of the structures
being built. The team hopes that this approach of ‘aerial additive manufacturing’ could help to build structures in difficult to access areas.
The cover shows an artist’s impression of Mbiresaurus raathi, a newly discovered species of herbivorous dinosaur found in Zimbabwe and dating to around 230 million years ago.
The cover captures the morning mist at Kaeng Krachan National Park in Thailand. Like every other aspect of life on Earth, forests are facing increased challenges posed by climate change. A collection of papers in this week’s issue probes the vulnerabilities and potential resilience of forests in a warming world. Three studies focus on North America: one examining the response of boreal species to warming and drought, another analysing the timing of stem growth in temperate deciduous forests, and a third revealing migration of white spruce (Picea glauca) into the Arctic tundra. In the tropics, one paper investigates the
Boomers Daily 