New guidance from the CDC says that 15 minutes of exposure – regardless of whether that occurs at one time – can result in transmission of the coronavirus. Source: https://earthsky.org/human-world/epidemiologist-explains-cdc-guidance-15-minutes-covid19-exposure…
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Will SpaceX’s Starlink satellites ruin stargazing?
SpaceX’s satellites will populate the night sky, affecting how we observe the stars. And this is just the beginning of private satellite mega-constellations. Source: https://earthsky.org/human-world/will-spacex-starlink-satellites-ruin-stargazing…
Why Arctic sea ice has stalled, and what it means for the rest of the world
In the next few decades, scientists expect we’ll see an ice-free Arctic Ocean throughout the summer. That prospect got much closer in 2020, due in part to the exceptional summer heatwave that roiled the Russian Arctic. Source: https://earthsky.org/earth/why-arctic-winter-sea-ice-stalled-2020…
The Arctic hasn’t been this warm for 3 million years
The last time CO2 concentrations reached today’s level was 3 million years ago, during the Pliocene Epoch. Hear from geoscientists who see evolving conditions in the Arctic as an indicator of how climate change could transform the planet. Source: https://earthsky.org/earth/arctic-warmest-3-million-years…
Covid-19 will probably become endemic. Here’s what that means
Rather than completely disappear – even when vaccines become available- it’s likely that the coronavirus SARS-CoV-2 will be added to the family of infectious diseases known as “endemic” in the human population. Source: https://earthsky.org/human-world/covid-19-coronavirus-will-probably-become-endemic-defintion…
Ancient microbial life used arsenic to thrive in a world without oxygen
Today, most life on Earth is supported by oxygen. But ancient microbial mats existed for a billion years before oxygen was present in the atmosphere. So what did life use instead? Source: https://earthsky.org/earth/ancient-microbial-life-arsenic…
Is Iceland’s most active volcano about to erupt?
The ice-covered Grímsvötn volcano produced an unusually large and powerful eruption in 2011. Now, says this volcanologist, there are clear signs that Grímsvötn is getting ready to erupt again. Source: https://earthsky.org/earth/grimsvotn-iceland-volcano-about-to-erupt…
Top 4 most promising worlds for alien life in the solar system
Where are the other most promising locations for extraterrestrial life in our solar system? Source: https://earthsky.org/space/et-alien-life-most-likely-worlds-solar-system…
Did this mass extinction event trigger dawn of the dinosaurs?
New research suggests that a series of huge volcanic eruptions, 233 million years ago, led to a mass extinction event that heralded the dawn of the dinosaurs. Source: https://earthsky.org/earth/mass-extinction-event-trigger-dawn-of-dinosaurs…
The detection of phosphine in Venus’ clouds is a big deal
Here’s how we can find out if it’s a sign of life. Source: https://earthsky.org/space/detection-phosphine-venus-clouds-sign-of-life…