Top Stories

By Lianne Kolirin, CNN The rotation of Earth‘s inner core may have paused and it could even go into reverse, new research suggests. The Earth is formed of the crust, the mantle and the inner and outer cores. The solid inner core is situated about 3,200 miles below the Earth’s crust and is separated from

By Jackie Wattles, CNN A nuclear thermal rocket engine in development could one day transport humans to Mars. The Defense Advanced Research Projects Agency, a research arm of the US Department of Defense, and NASA are setting their sights on a type of rocket engine that could be the holy grail for quickly and safely

By Megan Marples, Kristen Rogers and Rachel Ramirez, CNN The Doomsday Clock has been ticking for 76 years. But it’s no ordinary clock. It attempts to gauge how close humanity is to destroying the world. On Tuesday, the clock was set at 90 seconds until midnight — the closest to the hour it has ever

By Ashley Strickland, CNN The James Webb Space Telescope peered inside a wispy molecular cloud located 630 light-years away and spied ices made of different elements. Molecular clouds are interstellar groupings of gas and dust where hydrogen and carbon monoxide molecules can form. Dense clumps within these clouds can collapse to form young stars called