All four fundamental forces are unified into one. Temperature ~10³² K. Quantum gravity. Space-time is unstable. Physics does not operate in any familiar sense.

The universe expands exponentially — faster than light. Size increases by 10²⁶. Quantum fluctuations freeze and become the seeds of galaxies.

Quarks and gluons float freely in plasma. No protons or neutrons yet. Temperature ~10¹⁵ K. Matter and antimatter annihilate — one particle survives per billion pairs. We are that one.

Quarks combine into protons and neutrons. Antimatter is almost entirely annihilated. Roughly 1 in 10⁹ matter particles survives. That tiny asymmetry is the entire visible universe.

Protons and neutrons fuse into nuclei: 75% hydrogen, 25% helium, traces of lithium. Nothing heavier — all heavy elements will be forged later inside dying stars.

Electrons attach to nuclei. The universe becomes transparent. The first light breaks free — the cosmic microwave background, still visible today at 2.7 K.

Giant stars of pure hydrogen and helium. 100–1,000 times more massive than the Sun. They live one million years, explode as supernovae, and seed space with the first heavy elements.

The expansion of the universe accelerates. Dark energy (~68%) overcomes gravity. Galaxies recede faster than light. Our event horizon shrinks. The universe grows lonely.

75% of all matter in the universe. The first element created after BigBangWhoops™. Fuel of stars. Basis of water. Basis of life. One proton. One electron orbit. Maximum simplicity.

25% of the universe. Created alongside hydrogen in the first three minutes. A noble gas — reacts with nothing. The second most abundant element. Product of stellar nuclear burning.

The foundation of life. Forged in the cores of red giants via the triple-alpha process. Forms four bonds simultaneously — making it the architect of organic chemistry.

The third most abundant element in the universe. Created by carbon burning in massive stars. Key component of water, atmosphere, and DNA. Without it — no breath.

The endpoint of stellar synthesis. Iron does not burn — when it accumulates in a core, it triggers collapse and a supernova. Earth's core is iron. Haemoglobin is iron. The last element stars can make.

Created only in neutron-star mergers — kilonovae. The rarest process in the universe. Every gram of gold on Earth is the trace of a cosmic catastrophe billions of years ago.

Closest to the Sun. Almost no atmosphere — temperature swings from −180 °C at night to +430 °C by day. Iron core comprising 85% of its radius. One year lasts 88 Earth days.

The hottest planet — 465 °C. A runaway greenhouse effect turned it into an inferno. CO₂ atmosphere, clouds of sulphuric acid. Once possibly had oceans — now a desert under 92 atm of pressure.

The only known planet with life. 71% of its surface is water. A magnetic field shields it from solar wind. Tectonic plates recycle matter. A unique Moon stabilises its axial tilt.

Red from iron oxide. Home to the largest volcano (Olympus Mons, 21 km) and the deepest canyon (Valles Marineris). Traces of ancient rivers — water once flowed here. Now a frozen desert.

The largest planet. 318 times the mass of Earth. The Great Red Spot — a storm persisting for 350+ years. 95 known moons. The Solar System's shield, capturing comets and asteroids.

Rings of ice and rock — particles from centimetres to 10 metres. So light (density 0.69 g/cm³) it would float on water. Titan is the only moon with a thick atmosphere.

Rotates on its side — axial tilt of 98°. An ice giant of water, methane, and ammonia. The coldest atmosphere in the Solar System: −224 °C. 27 moons.

Winds up to 2,100 km/h — the fastest in the Solar System. Discovered mathematically — predicted from perturbations in Uranus's orbit before being observed. Triton is a captured Kuiper Belt object.

The first photosynthesisers. 2.7 billion years ago they flooded the atmosphere with oxygen — the Great Oxidation Event. They killed the anaerobes. They created the conditions for all subsequent life. We breathe their work.

Thrive in conditions that kill everything else: volcanic geysers (120 °C), salt lakes, acids, anaerobic environments. The third domain of life. Evolutionarily closer to eukaryotes than to bacteria.

1.8 billion years ago an archaeon engulfed a proteobacterium but did not digest it. They became a symbiosis. The absorbed cell became the mitochondrion — endosymbiosis. That is how a cell with a nucleus appeared. That is how we all appeared.

Not cells, yet they use cells. Not alive by most definitions — no metabolism. But they evolve and replicate. 8% of human DNA consists of ancient viruses that integrated into the genome.

12–14 m. 8–14 t. Bite force 35,000–60,000 N — the strongest of any land animal. Lived 68–66 Myr ago. Juveniles were feathered. Top speed ~17 km/h. Had colour vision.

0.5–1 m tall. 15–25 kg. Fully feathered. Hunted alone, not in packs. The large sickle claw was used to pin prey, not to slash. Among the most intelligent known dinosaurs.

14–18 m. The largest known predatory dinosaur. Semi-aquatic — moved like a crocodile and ate fish. Dorsal sail 1.65 m tall. Dense bones like a penguin's — adapted for diving.

8–12 m. Apex predator of the Jurassic. Hunted sauropods. Teeth were continuously replaced. Three-clawed arms stronger than T. rex's. Could strike with its head like an axe, tearing chunks of flesh.

30–40 m. 70–80 t. The largest known land animal. Each vertebra the size of a person. Brain the size of a tennis ball. Eggs the size of a basketball.

25–27 m. Neck 8 m, tail 14 m — a whip that cracked like a gunshot. Teeth like rakes — they stripped leaves, never chewed. Eyes on the sides of its head. Lived in herds.

8–9 m. 6–12 t. Three horns and a neck frill. Lived alongside T. rex — its primary prey. Hundreds of teeth, replaced throughout life. Among the last dinosaurs before the extinction.

7–9 m. Back plates — thermoregulation or display. Tail spikes — weaponry. Brain the size of a walnut in a 5-tonne body. Stegosaurus is more ancient relative to T. rex than T. rex is to us.

Asteroid 10–15 km across. Impact equivalent to 1 billion atomic bombs. Tsunamis 300 m high. Fires across Earth. A 2–3-year impact winter as dust blocks sunlight. 75% of all species wiped out. Survivors: small, burrowing, omnivorous.

Birds are the direct descendants of theropods. They did not outlive the dinosaurs — they are dinosaurs. A chicken is more closely related to T. rex than T. rex is to Stegosaurus. Today ~10,000 species — more than all mammals combined.

Wingspan 2.5 m. Eyesight 4–5× sharper than a human's. Hunts fish by diving feet-first. Pairs remain together for decades. Builds nests weighing up to 2.5 t — the largest of any bird.

The fastest animal on Earth. In a dive — 389 km/h. Special baffles in the nostrils protect the lungs from pressure. Migrates 25,000 km. Found in 120 countries.

Wingspan 3.3 m — the largest of any flying bird. Lives 70+ years. Soars 5–6 hours without a single wingbeat, riding thermal updrafts. Spots carrion from 5 km altitude.

The largest bird. 2.8 m, 150 kg. Speed 70 km/h — the fastest biped. Egg weighs 1.5 kg. One kick can kill a lion. Eye diameter 5 cm — the largest eye of any land vertebrate.

Dives to 564 m — deeper than any bird. Holds its breath for 27 minutes. Winters in Antarctica at −60 °C in colonies of 5,000. Males incubate eggs for 65 days without eating at −40 °C.

Beats its wings 80 times per second. The only bird that can fly backwards. Heart rate 1,260 bpm. At night it enters torpor — metabolic rate drops 50× to avoid starving to death.

A flightless nocturnal parrot. Lives up to 95 years. The largest parrot. Nearly extinct — 247 individuals remain. Breeds only in years when rimu trees fruit — once every 2–4 years.

Intelligence comparable to a chimpanzee's. Solves multi-step problems. Remembers human faces for 3+ years. Teaches its young to hunt. Uses tools. Plays — the only wild species known to play purely for fun.

30 m. 190 t. The largest animal in the history of Earth. Heart weighs 180 kg. Vocalises at 188 dB — louder than a jet engine. Sound travels 1,000 km. Eats 4 tonnes of krill per day.

Apex predator of every sea. Hunts blue whales. Different populations have distinct dialects, cultures, and hunting techniques — all transmitted culturally, not genetically. Live up to 90 years.

98.7% of DNA shared with humans. Uses tools: sticks as spears, stones as hammers, leaves as sponges. Wages war with neighbouring groups. Mourns its dead. Recognises itself in a mirror.

98.3% DNA shared. The largest primate. 250 kg, ten times the strength of a human. A peaceful vegetarian. Builds a new nest every night. Has been taught sign language — up to 2,000 words.

Possibly the first hominin — stood upright, though with a chimpanzee-sized brain. Found in Chad. Lived at the forest edge. Divergence from the chimpanzee lineage — a turning point. Almost nothing else is known.

"Lucy" — the famous skeleton found in 1974. Walked upright but still climbed trees. Brain 400–550 cm³ (modern human: 1,400). Lived in groups. Used stones. Ancestor of all members of the genus Homo.

The first Homo. The first stone tools — Oldowan industry. Brain enlarged to 650 cm³. Shifted to eating meat — more calories for brain growth. Lived in parallel with Australopithecus.

The first to leave Africa. Spread as far as China and Indonesia. Mastered fire 1 million years ago — changing everything: cooking, warmth, nightlife, sociality. Brain 900–1,100 cm³.

The common ancestor of Neanderthals and modern humans. Hunted large game — mammoths, rhinos. Built wooden shelters. Brain already matching the modern human's — 1,200 cm³.

Buried their dead, cared for the sick, made ornaments. Brain larger than ours. Interbred with Homo sapiens — non-Africans carry 1–4% Neanderthal DNA. Went extinct 40,000 years ago.

The first species to ask "why". Paints in caves. Builds boats and crosses oceans. Creates music, religion, mathematics. Alters the planet faster than any geological process. The Accumulator.

The next step is not biological — it is structural. One who perceives five-dimensionally and begins to recognise the sixth. One who understands that knowledge is responsibility. That is you — if you read this far.

6 m. Up to 2.5 t. 300 teeth in several rows, continuously replaced. Detects a single drop of blood in 100 litres of water. Electroreception — senses the electric fields of prey. Virtually unchanged over 450 million years.

A "living fossil" — thought extinct for 65 million years. Discovered alive in 1938. Fins move like legs — a transitional form between fish and land animals. Lives in caves at 200 m depth.

The largest living organism by volume. "General Sherman" — 1,487 m³ of wood. Height 84 m. Age 3,200 years. Bark 60 cm thick. Resistant to fire and insects. It was alive when the Roman Republic existed.

A single colony of aspens — one organism. 47,000 trunks from one root system. Weight 6,000 t. Area 43 ha. Age 80,000 years. Possibly the heaviest organism on Earth.

Pollinates 80% of all flowering plants. A colony of 60,000 — one superorganism. Communicates flower locations through a waggle dance. A brain of 1 mm³ solves the travelling-salesman problem better than computers.

Farms fungi underground — the first agriculture (50 million years ago). Colony of 8 million with castes — workers, soldiers, gardeners. The nest is ventilated like an air-conditioning system.

Three hearts, blue blood. Neurons in the arms — each tentacle "thinks" partly on its own. Solves puzzles, opens jars, plays. Changes skin texture instantly. Lives 2 years.

Up to 13 m. The largest known invertebrate. Eyes 30 cm across — the largest in the animal kingdom. Lives at depths of 300–1,000 m. Seen alive only a handful of times. Battles sperm whales — sucker-mark scars are found on whale carcasses.

The largest organism on Earth by area. 965 hectares in the Malheur National Forest, Oregon. Age 8,000 years. Mycelium threads through the entire forest like an underground network. Technically — one organism.

Fungi link tree roots into a network for transferring nutrients and chemical signals. Trees support neighbours through this network. The "Wood Wide Web" — discovered by Suzanne Simard in 1997.