Share this on WhatsApp Brown-headed cowbirds are obligate brood parasites. That means they lay their eggs in the nests of other birds, leaving all the hard work of incubating the eggs and feeding the chicks to somebody else. Luckily, many of those other species have evolved some anti-parasitic defenses. Yellow warblers, for example, produce a […]
Share this on WhatsApp When the novel coronavirus jumped to humans in late 2019—adapting so well to its new host species that it caused a pandemic—it was beating the odds. Although scientists estimate that roughly 60 percent of known human pathogens and up to 75 percent of those associated with emerging diseases originate in animals, […]
Share this on WhatsApp Scientists are split on a US Food and Drug Administration (FDA) proposal to update COVID-19 vaccines once a year, similar to the agency’s approach to updating influenza vaccines. At a meeting of the FDA’s vaccine advisory panel on 26 January, some researchers argued that the plan would help to simplify the […]
