World Explained · Body and senses
Why does stepping into sunlight make some people sneeze?
It is called the photic sneeze reflex. Bright light can trigger the sneeze circuit in susceptible people, but the exact nerve crossover remains unsettled.
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Newest first
United States
World Explained · Ocean science
How many types of sharks are there? Why they look so different
There are more than 500 described shark species. Their different shapes show how one cartilaginous fish blueprint has adapted to feeding and living in very different waters.
World Explained · Transport and engineering
Why bird strikes can be so dangerous for a jet engine
A bird strike is not just a dent in an aircraft. If a bird is ingested by a jet engine, fast-moving fan blades and the engine core can be affected.
World Explained · Travel and systems
A ground stop keeps an airport queue from forming in the sky
An FAA ground stop holds selected departures before takeoff when an airport cannot safely accept its expected flow. Here is why the delay spreads far beyond that airport.
World Explained · History and landscapes
Lake Mead’s ghost town was not lost—it was waiting below the waterline
St Thomas was deliberately evacuated and flooded as Lake Mead filled. Falling water later exposed its roads and foundations, turning reservoir level into a moving history line.
World Explained · Digital evidence
Content Credentials can prove a history without proving a picture is true
Content Credentials bind signed claims about a file's origin and edits to the file itself. They expose tampering with that record, but they cannot verify the scene or caption.
Newest first
United Kingdom
World Explained · Body and senses
Why does stepping into sunlight make some people sneeze?
It is called the photic sneeze reflex. Bright light can trigger the sneeze circuit in susceptible people, but the exact nerve crossover remains unsettled.
World Explained · Ocean science
How many types of sharks are there? Why they look so different
There are more than 500 described shark species. Their different shapes show how one cartilaginous fish blueprint has adapted to feeding and living in very different waters.
World Explained · Transport and engineering
Why bird strikes can be so dangerous for a jet engine
A bird strike is not just a dent in an aircraft. If a bird is ingested by a jet engine, fast-moving fan blades and the engine core can be affected.
World Explained · Space and astronomy
London will see a 91% eclipse at 7:13 p.m. — but it will not be total
London's maximum eclipse on 12 August 2026 is 91%, but the remaining bright crescent means it is a partial eclipse. The Moon's narrow inner shadow falls elsewhere.
World Explained · Archaeology and trade
Five hundred amphorae can turn a shipwreck into a map of Roman trade
A Roman wreck found off Sicily carries hundreds of Dressel 1A amphorae. Their shapes, origins and arrangement may reveal what the ship carried and where it was travelling.
World Explained · Weather and motion
A dust devil is a heat engine you can see because it picks up dirt
Strong sunshine heats a small patch of ground, buoyant air rises and rotation tightens into a visible column. Unlike a tornado, a dust devil can form beneath clear skies.
Newest first
Canada
World Explained · Body and senses
Why does stepping into sunlight make some people sneeze?
It is called the photic sneeze reflex. Bright light can trigger the sneeze circuit in susceptible people, but the exact nerve crossover remains unsettled.
World Explained · Ocean science
How many types of sharks are there? Why they look so different
There are more than 500 described shark species. Their different shapes show how one cartilaginous fish blueprint has adapted to feeding and living in very different waters.
World Explained · Transport and engineering
Why bird strikes can be so dangerous for a jet engine
A bird strike is not just a dent in an aircraft. If a bird is ingested by a jet engine, fast-moving fan blades and the engine core can be affected.
World Explained · Aviation and design
The A380 only makes sense when an airline can fill a very large promise
The four-engine superjumbo is costly to operate when demand is thin, but one full A380 can move a huge crowd through a scarce airport slot and support a premium long-haul product.
World Explained · Digital evidence
Content Credentials can prove a history without proving a picture is true
Content Credentials bind signed claims about a file's origin and edits to the file itself. They expose tampering with that record, but they cannot verify the scene or caption.
World Explained · Animals and optics
A chameleon changes colour by spacing tiny crystals under its skin
Panther chameleons tune the spacing of guanine nanocrystals in specialised skin cells, shifting which wavelengths reinforce one another and return as colour.
Newest first
Australia
Australian Curiosity · Wildlife
Why echidnas lay eggs but still count as mammals
An echidna hatches from a soft egg, then depends on months of milk released through pores in its mother's skin. Both parts belong to one mammalian story.
World Explained · Body and senses
Why does stepping into sunlight make some people sneeze?
It is called the photic sneeze reflex. Bright light can trigger the sneeze circuit in susceptible people, but the exact nerve crossover remains unsettled.
World Explained · Digital evidence
Content Credentials can prove a history without proving a picture is true
Content Credentials bind signed claims about a file's origin and edits to the file itself. They expose tampering with that record, but they cannot verify the scene or caption.
World Explained · Biology and perception
Your fingerprint began as three ridge waves meeting before birth
Fingerprints form when gene-guided ridge waves spread from a fetal fingertip's pad, nail edge and flexion crease. Their timing and geometry shape each pattern.
World Explained · Quantum computing
A neutral-atom quantum computer can rearrange its qubits mid-calculation
Laser tweezers let a neutral-atom processor shuttle qubits between storage, logic and readout zones, then replace lost atoms while a longer calculation continues.
World Explained · Food and chemistry
A popcorn kernel builds a steam engine and launches itself
A hard popcorn shell traps steam until hot starch breaks through, forms a temporary leg and flips the kernel. The pop is released vapour, not the shell cracking.
Newest first
Global
World Explained · Earth and environment
How satellites reveal an unusually busy Pacific cyclone season
A NASA EPIC image caught three Pacific cyclones at once. Here is what the 2026 count, basin definitions and El Niño can—and cannot—tell us.
World Explained · Space and technology
How Saturn's south pole grew a 10-sided atmospheric wave
Hubble found a moving 10-sided wave at Saturn’s south pole. Its shape is real; why it formed and how long it will last remain open questions.
Better Home · Bathroom
Why scrubbing grout harder can remove the grout itself
Cement grout, epoxy grout and flexible sealant are different materials. Repeated acid and force can remove the joint without solving the moisture, residue or installation problem beneath the stain.
World Explained · Space and technology
How could a Mars-orbit telecommunications relay make future missions easier to communicate with?
NASA's planned Mars Telecommunications Network could put a dedicated relay around Mars between missions and Earth. Here is how the handoff works—and what remains unproved.
Better Home · Bathroom
Why shower glass stays cloudy after the dirt is gone
Cloudy shower glass may be wet condensation, soap film, mineral scale, scratches or chemical corrosion. A small dry test can separate removable residue from permanent damage before stronger cleaning makes the problem worse.
World Explained · Space and technology
How an ISS spacewalk could upgrade navigation and science links
A planned ISS spacewalk will replace a Harmony retroreflector and route data-relay cables. Here is what those tasks can support—and what NASA has not yet measured.
Original writingEvery story is written for this publication.
Sources you can openFactual stories link to primary or authoritative material.
Clear correctionsMaterial errors are fixed and explained.