In early October 2020, President Trump tested positive for COVID-19.
Many people have smell loss with COVID-19.
Preventing, “undoing,” and adapting are 3 ways to avoid the worst climate change impacts.
Solar geoengineering is like drawing a curtain over the face of the Earth.
By studying asteroids, researchers can learn about the formation of planets.
Watch how a printing press works.
Learn why Egyptian hieroglyphs are hiding in modern alphabets—and how to find them.