Ikigai DailyThe examined world
Experiments, discoveries and scale-shifting facts about matter, life and the universe.
In this room
Cards are connected by subject and by mood. Move through the complete sequence below, or cross into a neighbouring part of the archive.
Q0568Einstein won the 1921 Nobel Prize not for relativity but for the photoelectric effect — the work that revealed light's particle side and later shaped solar panels and cameras.
Q0569Marie Curie won Nobel Prizes in two sciences — Physics (1903) and Chemistry (1911) — the first person ever to do so, and still one of very few.
Q0571The Voyager probes launched in 1977, but the first web server didn't run until 1990 — a spacecraft was already leaving the planets before the web was even born.
Q0573On Earth a day is far shorter than a year, but that's not universal: on Venus a day outlasts its year, a reminder that our everyday sense of time is a local habit.
Q0574During the First World War Marie Curie built mobile X-ray units, driving them to the front herself so surgeons could find bullets and shrapnel — her science put directly to saving lives.
Q0575In 1905, his 'miracle year', Einstein published papers that reshaped physics — all while working as a clerk in a Swiss patent office, doing science in his spare time.
Q0583Neuroplasticity means the nervous system can change its activity, structure and connections with experience — the biological basis of learning, recovery and lifelong change.
Q0584Practice is not idle repetition; each attempt gives the nervous system feedback to refine the skill — which is why deliberate, focused practice beats mindless drilling.
Q0611Leonardo's notebooks are less like tidy papers and more like a working laboratory on the page: muscle studies, flying machines, war devices, plant observations and painting problems sit side by side. For him, drawing was not just a way to record the world; it was a method for understanding it.
Q0621National Geographic notes the Great Pyramid was the tallest human-made structure on Earth for nearly 4,000 years — a record no building broke until the modern age.
Q0627Voyager launched in 1977, long before the first web server in 1990 — so a probe was leaving the Solar System before the web that now spans Earth even existed.
Q0628Einstein is popularly tied to relativity, yet his Nobel Prize honoured the photoelectric effect — a reminder that a genius's official recognition can rest on unexpected work.
Q0636Focus is not separate from the body carrying it. Poor sleep, dehydration, hunger and stillness can all make thinking feel heavier. This matters globally because people often moralise fatigue instead of supporting the conditions for clear thought. The so-what: before blaming yourself, check the basics that keep a brain online.
Q0640Everyday words carry old worlds inside them: 'disaster' hides a bad star, 'quarantine' forty days, 'robot' forced labour — language as a museum you speak without noticing.
Q0648The Wright Flyer's first hop covered just 120 feet (37 m) — less than a human lifetime later, humans walked on the Moon. Progress can accelerate almost beyond belief.
Q0649Einstein's work on the photoelectric effect showed light can knock electrons free from metal — the principle now behind solar cells, light sensors and digital cameras.
Q0650Nobel materials link Einstein's photoelectric work to everyday tech — solar panels, sensors, cameras. Abstract physics from 1905 quietly runs the devices in your pocket.
Q0654Once it was believed the adult brain couldn't change. Research from the 1970s onward showed neurons form new connections throughout life — the basis of all learning and recovery.
Q0655The long-quoted '100 billion' was an estimate; Suzana Herculano-Houzel's 2009 cell-counting method put the figure near 86 billion.
Q0658Most of that energy isn't 'thinking' — it powers the constant baseline activity of billions of neurons keeping the system ready.
Q0662Dopamine helps the brain pay attention to cues, prediction errors and possible rewards — which is why the ping before a message can feel powerful before you even know what arrived. What pulls your attention often begins before the reward itself.
Q0827In a vacuum, light moves at 299,792,458 metres per second, the universal speed limit used in modern physics. The number is so large that everyday intuition fails: the Moon is only about 1.3 light-seconds away.
Q0828A light-year is a distance, not a time — about 9.5 trillion kilometres (5.9 trillion miles), the span light crosses in a year. The nearest star beyond the Sun, Proxima Centauri, is over four light-years away, meaning its light reaches us having left before you were likely born.
Q0829If an atom were scaled up, its nucleus would be tiny compared with the space occupied by its electron cloud. Yet tables, bones and phones feel solid because electromagnetic forces resist overlap. This matters globally because everyday reality is built from invisible structure. The so-what: what feels simple to touch can be strange underneath.