Marcelo Gleiser Marcelo Gleiser is a contributor to the NPR blog 13.7: Cosmos & Culture.

Story Archive

This image, taken with NASA's Hubble Space Telescope, shows the supernova remnant SNR 0509-68.7, also known as N103B. It is located 160,000 light-years from Earth in a neighboring galaxy called the Large Magellanic Cloud. Space Telescope Science Institute/NASA, ESA and Y.-H. Chu (Academia Sinica, Taipei) hide caption

toggle caption
Space Telescope Science Institute/NASA, ESA and Y.-H. Chu (Academia Sinica, Taipei)

What scientists believe to be our oldest ancestor, the single-celled organism named LUCA, likely lived in extreme conditions where magma met water — in a setting similar to this one from Kilauea Volcano in Hawaii Volcanoes National Park. Danita Delimont/Getty Images/Gallo Images hide caption

toggle caption
Danita Delimont/Getty Images/Gallo Images

Astronomers have discovered a star, shown in an artist's rendition, that appears to be orbiting an invisible black hole with about four times the mass of the sun. L. Calçada/ESO hide caption

toggle caption
L. Calçada/ESO