Native Americans Were Siberians First – Isotope analysis, ancient pathogen genomics, plus a dash of human population genetics have revealed the deeper connection to date between the early peoples of Siberia and the Americas. During the Early Bronze Age, people were expanding.

Source: He Yu, et al. Paleolithic to Bronze Age Siberians Reveal Connections with First Americans and across Eurasia. Cell, 2020.

Trees in forests all over the world are getting younger, shorter – Trees in forests around the world are getting younger and shorter as a result of human-caused climate change.

Source: Nate G. McDowell, et al. Pervasive shifts in forest dynamics in a changing world. Science, 2020.

The asteroids Ryugu and Bennu were formed by the destruction of a large asteroid – What is the origin of the asteroids Bennu and Ryugu, and of their spinning-top shape? Numerical simulations of large asteroid disruptions show that during such events, fragments are ejected and then reaccumulate forming aggregates, some of which have a spinning-top shape. Scientists conclude that the overall properties of Bennu and Ryugu could directly result from the disruption of their parent body.

Source: P. Michel, et al. Collisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu. Nature Communications, 2020.

Weeds get a bad rap, but many are crucial to the ecosystem – In this week's issue of our environment newsletter, we look at the benefits of weeds, the benefits of 'forest bathing' and whether the current drop in carbon emissions is likely to last.

Source: Yuli Shan, Qi Huang, Dabo Guan, Klaus Hubacek. China CO2 emission accounts 2016–2017. Scientific Data, 2020.

Why attempts to use antiviral drugs to fight COVID-19 are so different from the early days of HIV – Doctors are exploring how to attack COVID-19 with antiviral treatments repurposed from HIV and Ebola.

Source: John H. Beigel, et al. Remdesivir for the Treatment of Covid-19 — Preliminary Report. New England Journal of Medicine, 2020.

Hurricane Season Will Be Above Average, NOAA Warns – Federal forecasters expect 3 to 6 major hurricanes during the 2020 hurricane season, which runs from June 1 to November 1. Rising seas and a warmer climate make storms of all sizes more damaging.

Source: James P. Kossin, Kenneth R. Knapp, Timothy L. Olander, Christopher S. Velden. Global increase in major tropical cyclone exceedance probability over the past four decades. Proceedings of the National Academy of Sciences, 2020.

Bumblebees speed up flowering – When pollen is in short supply, bumblebees damage plant leaves in a way that accelerates flower production, as an ETH research team headed up by Consuelo De Moraes and Mark Mescher has demonstrated.

Source: Foteini G. Pashalidou, Harriet Lambert, Thomas Peybernes, Mark C. Mescher, Consuelo M. De Moraes. Bumble bees damage plant leaves and accelerate flower production when pollen is scarce. Science, 2020.

Half the matter in the universe was missing. We found it hiding between galaxies. – The whole time it was in WHIM, the million-degree plasma that's permeated through the universe since the Big Bang.

Source: J.-P. Macquart, et al. A census of baryons in the Universe from localized fast radio bursts. Nature, 2020.

Precise Measurements of Nearest Earth-Sized Exoplanet – Breakthrough measurements of exoplanet Proxima B were made with radial velocity measurements of unprecedented precision using ESPRESSO, the Swiss-manufactured spectrograph – the most accurate... [[ This is a content summary only. Visit my website for full links, other content, and more! ]]

Source: A. Suárez Mascareño, et al. Revisiting Proxima with ESPRESSO. arXiv, 2020.

Climate change: 'Stunning' seafloor ridges record Antarctic retreat – Scientists are learning just how fast the ice margin of Antarctica can retreat in a warming world.

Source: J. A. Dowdeswell, et al. Delicate seafloor landforms reveal past Antarctic grounding-line retreat of kilometers per year. Science, 2020.

New data indicates the Mississippi Delta is on borrowed time – The tipping point has come and gone, according to new analysis.

Source: Torbjörn E. Törnqvist, Krista L. Jankowski, Yong-Xiang Li, Juan L. González. Tipping points of Mississippi Delta marshes due to accelerated sea-level rise. Science Advances, 2020.