Source: twitter.com
A sliver of Antarctic ice revealing the myriad enclosed tiny bubbles of air. Air bubbles trapped in ice hundreds or even thousands of years ago are providing vital information about past levels of greenhouse gases in the Earth's atmosphere. Via.
Source: scienceimage.csiro.au
“Aerosolized microorganisms may play an important role in climate change, disease transmission, water and soil contaminants, and geographic migration of microbes. While it is known that bioaerosols are generated when bubbles break on the surface of water containing microbes, it is largely unclear how viable soil-based microbes are transferred to the atmosphere. Here we report a previously unknown mechanism by which rain disperses soil bacteria into the air. Bubbles, tens of micrometres in size, formed inside the raindrops disperse micro-droplets containing soil bacteria during raindrop impingement. A single raindrop can transfer 0.01% of bacteria on the soil surface and the bacteria can survive more than one hour after the aerosol generation process. This work further reveals that bacteria transfer by rain is highly dependent on the regional soil profile and climate conditions.” Via.
Source: nature.com
Time-lapse X-ray video of pupation in Calliphora vicina, beginning at 28 hours after pupariation. The pupa was imaged with the dorsal surface uppermost and its head at the top of the video. Via.
Source: datadryad.org
Between 1850 and 1859 Welling operated a daguerreotype portrait studio at 226 Bleecker Street in New York City. No ordinary likeness, this daguerreotype (a unique silver image on a copper plate) of James Hyatt served as the basis for an engraving in his textbook for schoolchildren "The Elements of Chemistry" (1855). According to Hyatt, chlorine gas is used “medicinally in pulmonary diseases, in which case it is best inhaled from an exceedingly dilute aqueous solution, by drawing with the mouth at the tube in a simple apparatus.” The portrait provided an effective illustration of the scientific technique as well as a cautionary tale: Hyatt warns his young readers that overexposure can lead to “inflammation, coughing, spasms, and death.” Via.
Source: metmuseum.org