DISCOVERY AREA
Space & Time
Why does time accumulate at different rates? How does light travel through space-time? Explore step by step with atomic clocks, gravitational lenses, and current research measuring the expansion of the universe.
Why relativity complicates the everyday idea that distant events share a single present.
Open article →NEWFive Frontiers · 15 Oct 2026Is Time Real or a Human Perception? Two Clocks, Two QuestionsRelativity changes measured duration; attention and memory change experienced duration. The two effects answer different questions.
Open article →NEWNew research · 7 minDo Atomic Clocks Define Time—or Only Measure It?Atomic clocks realise the SI second with extraordinary precision, but precision does not settle the philosophical nature of time.
Open article →01Uzun okuma · 10 dkHow do light cones limit causality?How does space-time determine which past an event can be affected by and which future it can affect?
Open article →02Uzun okuma · 12 dkHow does the Earth drag through space-time?How did Gravity Probe B measure frame drag around the rotating Earth?
Open article →03Uzun okuma · 14 dkHow do atomic clocks measure space-time?From height differences on a centimeter scale to relativity tests.
Open article →04Uzun okuma · 16 dkHow do gravitational waves make the universe listen?Measurable vibrations emitted into space-time from merging black holes.
Open article →05Uzun okuma · 18 dkWhat does a gravitational wave actually measure?LIGO investigates extremely small relative length changes in space-time with interferometers.
Open article →06Uzun okuma · 20 dkHow atomic clocks test Einstein's timeMountaintop, space station and optical clocks: gravity's influence on time becomes measurable.
Open article →07Uzun okuma · 22 dkListening to spacetime: new IR1 observation planLIGO, Virgo and KAGRA's September 3 schedule separates the renewal period and the new observation run.
Open article →08Uzun okuma · 24 dkHow will LISA listen to spacetime?Measurement rationale and objectives of a space-based gravitational wave observatory.
Open article →09Uzun okuma · 26 dkNew test of space-time: 2026 gravitational wave resultsHow is Einstein's theory tested in strong gravity; What does the result not prove?
Open article →010Source file · 4 minHow fast is the universe expanding? 2026 standard siren resultsA new way of measuring Hubble voltage, redshift and 236 gravitational wave sources.
Open article →011Source file · 4 minHow does space-time bend light? Gravitational lenses and EuclidEinstein rings, dark matter and the 2026 citizen science project: what can we learn from an image?
Open article →012Source file · 4 minWhy doesn't time flow at the same pace for everyone? From atomic clocks to GPSSpeed, gravity, eigentime, and precision clocks: understanding time dilation step by step.
Open article →013Uzun okuma · 34 dkWhy doesn't time flow the same for everyone?Speed, gravity and measured time.
Open article →014Uzun okuma · 36 dkAre wormholes possible?Mathematical passages and reality testing.
Open article →015Uzun okuma · 38 dkWhy does the arrow of time move forward?Entropy, memory and cosmic aspect.
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FIVE FRONTIERS · 17 OCTOBER 2026