American artist Kehinde Wiley has unveiled an exhibition in Morocco of portraits of African leaders as part of a yearslong ...

Q: If the gravity of a black hole is so strong that nothing can escape from it, not even light, how has the Hubble Space Telescope recorded images of gas jets ejected from black holes?

This advertisement has not loaded yet, but your article continues below. For the first time in eight years, the Ottawa Senators are in the playoffs — and what better way to return than in a ...