13.8 billion years on one board: nine chapters, over fifty capsules, and the questions still open at every step. Follow the threads from the first instant to the first cities.
A thesis board: what the library says about how much warming a doubling of carbon dioxide brings.
A one-hour lesson built on verified capsules, with one myth the evidence has retired.
The case for the Big Bang, the evidence behind it, and the parts cosmology is still arguing about.
An investigation: what is settled about how life works and changes, and what is still open about how it began.
What the record shows about Egypt's pyramid builders, and which parts of the method are still argued over.
The leading account of the Moon's birth, the samples that test it, and the questions it has not closed.
Consciousness, free will and dreaming, side by side: where the evidence stands on each.
Eighteen ideas that serious people once believed, each beside the evidence that retired it. Being wrong in public is how science moves.
Sixteen claims you have probably heard this year, each beside what the evidence actually shows. Good for settling arguments.
The Fermi paradox, the answers on offer, where the telescopes are looking, and how tough life on Earth turned out to be.
Bodies built for running, brains fed by cooking, grandmothers, gossip and language: the hypotheses for how our species became what it is, with the record they have to explain.
A one-hour lesson on telling strong evidence from weak: the method, the traps, and famous results that did not hold up.
The live hypotheses side by side, from chemical imbalance to inflammation, the gut and social defeat, and why none of them has won yet.
Quantum mechanics and general relativity are each tested to astonishing precision, and they do not fit together. The evidence, the particle zoo, and the candidates for a theory of everything.
From bad air and bloodletting to germ theory, vaccines, antibiotics and the eradication of smallpox, and the fights still ahead.
Truths proven for all time, problems nobody has cracked, and the theorems that prove some things can never be proven or computed.
Fat, salt, breakfast and ultra-processed food: what is settled, what is still argued, and why nutrition science is so hard to do.
Energy from the Sun, carbon in the air and sea, heat carried by currents and winds, and how scientists measure and predict it all.
Evolution's answers, what goes wrong inside the cell, and the diseases that come with the years.