A Chinese spacecraft that burned up high over Los Angeles created a sonic trail detected by ground-based sensors. When you purchase through links on our site, we may earn an affiliate commission. Here ...

Both nebulas are the leftover remnants from the last phase of a medium star like our sun. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

Amid this week’s frigid temperatures, a space heater is being recalled for electric shock and fire hazards. While space heaters are generally safe to use to supplement furnaces during cold weather, ...