In tests to determine if the northern Marshall Islands are safe for resettlement after nuclear testing nearly 70 years ago, scientists discovered that the areas are worse off than previously thought.
We all know the clicking of Geiger counters from movies, and we all know that the faster the counter clicks, the worse things are. But how exactly do they work?
Extremophiles challenge everything we thought we knew about the existence of life on Earth. Now, astrobiologists are questioning if some extremophiles are actually aliens living among us. Just who are these incredible creatures, and what can we learn from them?