Newest
-

How Does One Find the Deepest Point in the Ocean?
Finding the deepest point in ocean terrain begins with sound, which travels through seawater far better than light. Scientists use sonar to send sound pulses toward the seabed and time their return. That sounds straightforward, until you’re measuring nearly 11 kilometers of water and trying to distinguish a genuine depression from an instrument error. Sonar…
-

How Does One Turn Seawater Into Drinking Water?
You can stand beside an entire ocean and still have nothing safe to drink. In places facing water scarcity, seawater desalination solves that peculiar problem by separating fresh water from dissolved salts, usually through pressure-driven membranes or evaporation. The separation is only part of the job: water also needs treatment and testing before it reaches…
-

How Does One Date a Fossil Millions of Years Old?
A fossil’s age can come from a rock that contains no fossil at all. Dating fossils can involve measuring nearby volcanic rocks, then working out where the remains fit in the sequence. If you’ve wondered how a museum can confidently label a skeleton millions of years old, that geological context is the answer. The number…

























