Heat pumps may steam, stop their outdoor fan, and blow cooler air during defrost. See what is normal and when ice signals a problem.
Category - Science
The science category is designed to provide students with a comprehensive understanding of the natural world and the scientific principles that govern it. This category includes articles, tutorials, and resources on a range of topics, including physics, chemistry, biology, and more.
Akshay Dinesh
How GRACE Satellites Track Groundwater From Space
GRACE satellites detect tiny gravity changes to reveal where groundwater, reservoirs, soil moisture, snow, and ice are gaining or losing water.
Why Scientists Send Brain Organoids Into Space
Brain organoids can reveal how microgravity changes neural cells and may sharpen research into Parkinson’s, Alzheimer’s, and other disorders.
Why Sour Candy Makes Your Mouth Hurt
Sour candy’s acids create a sharp pucker, but long exposure can irritate the mouth and soften enamel. See what the chemistry reveals.
Shark Depredation: Why Sharks Steal Fish From Fishing Lines
Shark depredation is rising in Gulf surveys. See how scientists measure it, why it may be increasing, and why simple fixes are hard.
Why Concrete Gets Hard Without Drying Out
Concrete does not harden by drying. See how cement hydration, curing, and the water-cement ratio turn a pourable mix into durable stone.
How Brown Fat Turns Stored Energy Into Heat
Brown fat does more than store energy. See how its mitochondria generate heat, how scans revealed it in adults, and what new research means.
How 798 Mirror Segments Act Like One Giant Telescope
See how sensors, actuators, phasing, and adaptive optics make the ELT's 798 mirror segments behave like one 39-metre surface.
How Prosthetic Hands Can Return a Sense of Touch
See how sensors, haptic armbands, and nerve stimulation can send grip and touch information from a prosthetic hand back to its user.
How the MMX Mission Will Bring a Piece of Phobos to Earth
JAXA’s MMX mission will collect Phobos grains that could reveal whether Mars’s moons formed in an impact or arrived as captured asteroids.
How Saildrones Measure the Southern Ocean’s Carbon Sink
See how wind-powered Saildrones measure carbon exchange around Antarctica and fill a crucial gap in Southern Ocean winter data.
How Scientists Track Bats Flying Over the Ocean
See how acoustic detectors and tiny radio tags reveal bat migration over coasts and open water, and why the routes matter for wind energy.
How to Read NOAA’s 2026–27 Winter Outlook
Learn what NOAA’s winter probability maps mean, where El Niño shifts the odds, and why the outlook is not a seasonal snowfall forecast.
How the Fire Amoeba Survives Heat That Stops Most Complex Cells
The fire amoeba reproduces at 63°C, a new record for complex cells. See how it protects proteins, DNA, and membranes from extreme heat.
How Soap and Water Remove Germs From Your Hands
See how surfactants, friction, rinsing, and drying remove germs, and when soap works better than hand sanitizer.
