EarthSky Voices
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What the coronavirus does to your body that makes it so deadly

How the coronavirus infects and how it makes people sick.

Why did Ecuador’s tallest waterfall stop flowing?

With water dropping 150 meters (490 feet) through a thick patch of cloud forest, San Rafael Waterfall was one of Ecuador’s most captivating landscapes and attracted tens of thousands of visitors per year. But on February 2, the water stopped flowing.

Fossil skull suggests human ancestors emerged 200,000 years earlier than thought

This newly discovered fossil is a hugely important find, say scientists. It means that one of our earliest ancestors possibly originated in southern Africa. Read more

How to model a pandemic

Behind every government announcement, there is an army of epidemiologists predicting how the virus will spread, and how to beat it. Note that this story doesn’t deal specifically with the University of Washington models released April 5, projecting U.S. infections and deaths from COVID-19 in the coming months. But it does provide insights into how scientists create models.

A swirling disk with 2 jets at either pole.

Quasar tsunamis rip across galaxies

Astronomers using the Hubble Telescope found that the region around a quasar’s black hole pushes out material at a few percent the speed of light. These quasar tsunamis wreak havoc on the galaxies in which the quasars live.

Ancient 4-limbed fish reveals origin of human hand

The origin of digits in land vertebrates is hotly debated, but a new study suggests that human hands likely evolved from the fins of Elpistostege, a fish that lived more than 380 million years ago.

School children in uniforms standing on painted Venn Diagrams.

Social distancing: What it is and why it’s the best tool to fight coronavirus

With no vaccines or treatments, the fight against coronavirus comes down to this behavioral technique. A physician explains how it works.

What is the gegenschein?

The sun’s counterglow – or gegenschein – is kind of a stargazers’ legend. What is it, and how can you see it? Erwin Matys and Karoline Mrazek of Project Nightflight explain.

Purple-headed bird in flight near feeder.

Top tips for feeding wild birds

It’s OK to feed wild birds. Here are some tips for doing it the right way from a wildlife ecologist.

Antarctica melts under its hottest days on record

On February 6, weather stations recorded the hottest temperature on record for Antarctica, 64.9°F (18.3°C). The warm spell caused widespread melting on nearby glaciers