How Much Water Should You Drink? What the Evidence Actually Shows
When is thirst enough, and when does more water help?
Selected research
Four investigations worth starting with
Can a Country Make You Happier? What Rankings Miss
What happiness rankings measure, and what they leave out.
What Actually Changes When You Move Abroad? Interactive Calculator
Compare purchasing power, well-being, health and relocation trade-offs.
Coffee Can Follow You Into Sleep
How caffeine changes sleep, even when you fall asleep easily.
All articles
Want to know how happy someone is? Ask them. Or watch how often they smile. But what…
Does your blood type tell you what to eat? We examine the ABO diet, the surprising history of blood types, and what studies of personalized nutrition actually show.
SpaceX created a city. Próspera sells different rules. Why might a durable deal with a state be worth more than a flag?
Higher floors often mean less fresh traffic pollution. But a sheltered courtyard can beat a higher road-facing window. What should you check before choosing an apartment?
Long after harvest, an apple keeps consuming oxygen. So does a blueberry, at almost the same rate in the cold. Why does one last months and the other weeks?
We compared laboratory food tests with portions people actually eat. The cadmium comparison reverses. Other results become misleading unless you know which chemical was measured. Explore the Food Market Atlas.
Three blood-pressure readings, one person, two different labels. Our reanalysis of 6,100 US adults found category changes in about one in six cases. What actually changed?
Workers in some occupations live years longer than those in others. French life tables and original Spanish mortality calculations show the differences, and what they do not prove about the effects of work.
Coffee may affect sleep even when you feel rested. What trials reveal about dose, timing, decaf, and why the 8.8-hour rule is not a safe cutoff.
A country ranking compares residents; migration changes the environment around the same person. What travels with you, what changes quickly, and what only partly adapts?
Electrolyte drinks can change short-term fluid retention. But do healthy adults benefit from drinking them every day? We followed the evidence.
Breakfast at 10 a.m. may be early for one person and late for another. Three different clocks tell three different stories. Which one actually matters for health?
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