Human Tech Tree

Life

Biology & Genetics

66 points from the earliest roots to the research frontier: 46 researched, 10 current research, 5 unsolved and 5 that become possible once they are solved. State of knowledge: October 2026.

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Antiquity3000 BC – 500 AD

  • Aristotle's natural history~340 BCResearchedAristotle dissected and described hundreds of animal kinds and grouped them by shared traits, making biology a science of observation.

Middle Ages & Renaissance500 – 1700

  • Microscope1665ResearchedLens-based microscopes revealed that living things are built from tiny units and teem with invisible microbes.
  • Redi refutes maggots from meat1668ResearchedFrancesco Redi showed in 1668 that maggots come from flies' eggs, not from rotting meat: the first controlled test of spontaneous generation.

Industrial Age1700 – 1900

  • Linnaeus and classification1735ResearchedLinnaeus's Systema Naturae (1735) and two-part Latin names gave every species a place in one nested system.
  • Photosynthesis discovered1779ResearchedJan Ingenhousz showed in 1779 that green plants renew air only in sunlight; later work found they build sugar from carbon dioxide and water.
  • Cell theory1838ResearchedAll living things consist of cells, and every cell comes from another cell.
  • Evolution by natural selection1859ResearchedSpecies change over generations because individuals that fit their environment leave more offspring.
  • Mendel's laws of heredity1866ResearchedCrossing pea plants showed that traits are inherited as separate units that follow statistical rules.
  • Viruses discovered1892-1898ResearchedSap from sick tobacco plants still infected healthy plants after filtering, revealing agents smaller than any bacterium: viruses.
  • Enzymes: life without cells1897ResearchedEduard Buchner fermented sugar with a cell-free yeast extract in 1897, showing that chemical catalysts, not a vital force, drive life's reactions.

Machine Age1900 – 1945

  • Hormones1902-1905ResearchedBayliss and Starling showed in 1902 that a gut chemical travels in the blood to trigger the pancreas; in 1905 Starling named such messengers hormones.
  • Chromosome theory of heredity1915ResearchedGenes sit in a line on chromosomes, which explains how traits are passed on and sometimes inherited together.
  • Ecology and the ecosystem1935ResearchedArthur Tansley coined 'ecosystem' in 1935 for living things and their surroundings as one system; Lindeman's 1942 energy-flow study made ecology…
  • Krebs cycle1937ResearchedHans Krebs described the citric acid cycle in 1937: a loop of reactions that burns food molecules to release the energy cells run on.
  • Modern evolutionary synthesis1942ResearchedIn the 1930s-40s population genetics fused Darwin's selection with Mendel's genes into one theory of evolution.
  • DNA is the hereditary molecule1944ResearchedExperiments with bacteria and viruses showed that DNA, not protein, carries genetic information.

Atomic & Space Age1945 – 1990

  • Honeybee dance language decoded1946-1967ResearchedKarl von Frisch showed that a forager's waggle dance tells nestmates the direction and distance of food; he shared the 1973 Nobel Prize for…
  • Cell culture and HeLa cells1951ResearchedGrowing human cells outside the body: in 1951 George Gey's HeLa line became the first human cells to divide indefinitely in a dish.
  • Structure of DNA1953ResearchedThe double helix explained how genetic information is stored and copied.
  • Songbirds learn their songs1954-1970ResearchedThorpe (1954) and Marler (1970) showed that songbirds learn their songs by hearing adults early in life, which made birdsong a standard model of…
  • First protein structure1958ResearchedJohn Kendrew solved the 3D structure of myoglobin by X-ray crystallography in 1958; Max Perutz followed with haemoglobin.
  • Gene regulation (operon)1961ResearchedJacob and Monod's operon model (1961) showed that genes are switched on and off and that messenger RNA carries the message.
  • Telomeres and the Hayflick limit1961-1985ResearchedHayflick found in 1961 that normal human cells divide only about 40 to 60 times; telomere shortening and telomerase (1985) explained why. Nobel…
  • The genetic code1966ResearchedThree DNA letters spell one amino acid: the dictionary between genes and proteins was cracked.
  • Endosymbiosis1967ResearchedLynn Margulis argued in 1967 that mitochondria and chloroplasts descend from free-living bacteria that moved into early cells; DNA evidence later…
  • Reverse transcriptase1970ResearchedHoward Temin and David Baltimore found independently in 1970 that some viruses copy RNA into DNA, overturning the assumed one-way flow of genetic…
  • Humpback whale song described1971ResearchedPayne and McVay's 1971 Science paper showed that humpback sounds form songs of 7 to 30 minutes that repeat with great precision; what they are for…
  • Genetic engineering1973ResearchedStanley Cohen and Herbert Boyer moved a gene from one organism into another using recombinant DNA.
  • Oncogenes1976ResearchedBishop and Varmus showed in 1976 that a cancer-causing virus gene is a copy of a normal gene in our own cells: cancer is a disease of damaged genes.
  • Sanger DNA sequencing1977ResearchedFrederick Sanger's chain-termination method (1977) made it possible to read DNA letter by letter.
  • Three domains of life1977ResearchedCarl Woese's ribosomal RNA comparisons showed in 1977 that archaea are a separate branch from bacteria, redrawing the tree of life into three domains.
  • Vervet monkey alarm calls1980ResearchedSeyfarth, Cheney and Marler (1980) found distinct vervet alarm calls for leopards, eagles and snakes; played-back calls alone trigger the matching…
  • Catalytic RNA and the RNA world1982-1983ResearchedIn 1982-83 Cech and Altman found that RNA can act as an enzyme, not only carry genetic information; they shared the 1989 Nobel Prize in Chemistry.
  • DNA fingerprinting1984ResearchedAlec Jeffreys found in 1984 that repeating stretches of DNA differ from person to person, giving forensics and paternity testing a genetic identifier.
  • PCR1985ResearchedPolymerase chain reaction copies a tiny piece of DNA millions of times in a few hours.

Digital Age1990 – 2015

  • Green fluorescent protein1994ResearchedA glowing jellyfish protein, expressed in other organisms from 1994, lets scientists watch genes, proteins and cells at work inside living tissue.
  • Cloning (Dolly the sheep)1996ResearchedA nucleus from an adult cell, placed into an egg, produced a healthy, genetically identical mammal.
  • RNA interference1998ResearchedFire and Mello showed in 1998 that double-stranded RNA silences matching genes; the first RNA-interference drug reached patients in 2018.
  • Genome sequencing2003ResearchedReading all three billion letters of the human genome, and then making that routine.
  • Genome-wide association studies2005ResearchedThe first genome-wide association study (2005, an eye disease) compared DNA variants of patients and controls, opening gene mapping of common…
  • Induced pluripotent stem cells2006ResearchedFour genes turn ordinary adult cells back into stem cells that can become any tissue.
  • Human microbiome2007-2012ResearchedThe NIH Human Microbiome Project, launched in 2007, used DNA sequencing to map the microbes on and in healthy people; its first results appeared in…
  • Organoids and Organ-Chips2009–2025Current researchStem-cell mini-organs and organ-chips test drugs on human tissue; in April 2025 the FDA announced a plan to phase out animal testing for some drugs.
  • CRISPR gene editing2012ResearchedA programmable molecular scissor lets researchers edit DNA at a chosen spot, cheaply and quickly.

Present2015 – Oct 2026

  • Asgard Archaea & Complex Life2015–2020ResearchedArchaea found from 2015 carry genes once thought unique to complex cells; a first cultured Asgard archaeon in 2020 supports a symbiotic origin of…
  • Base and prime editing2016Current researchGentler gene editors change single DNA letters or rewrite short stretches without cutting both strands.
  • Single-cell atlases2016Current researchSequencing individual cells is building a map of every cell type in the human body.
  • Cryo-EM Resolution Revolution2017ResearchedDirect electron detectors made cryo-electron microscopy atomic-resolution (Chemistry Nobel 2017); it now supplies about 45% of new protein structures.
  • AI protein structure prediction2020Current researchDeepMind's AlphaFold predicts a protein's 3D shape from its amino acid sequence, nearly as well as experiments.
  • AI bioacoustic monitoring2021-2026Current researchBirdNET (6,000+ species claimed), Merlin Sound ID (2021) and Perch 2.0 (2025) sort field recordings automatically; in one test humans still detected…
  • Ancient DNA & Human Origins2022ResearchedSequencing DNA from bones, teeth and sediments revealed Neanderthal and Denisovan ancestry in living people; Svante Pääbo won the 2022 Nobel Prize.
  • Complete genome and pangenome2022Current researchThe first gap-free assembly of every human chromosome except Y (2022, Y added in 2023) and a growing pangenome that captures human diversity.
  • AI protein design2023Current researchGenerative AI invents new proteins, enzymes and even antibodies that never existed in nature.
  • Animal-sound foundation models2024-2026Current researchNatureLM-audio (2024) and DolphinGemma (2025) are audio-language models for animal sounds; so far they give labels and predictions, not call meanings.
  • Project CETI: sperm whale codas2024-2026Current researchProject CETI's 2024 paper found four sperm whale coda features that combine freely; 2025-26 papers add vowel-like patterns. What codas mean is still…
  • Synthetic genomes2025Current researchWhole genomes are now designed on a computer, written chemically and booted up in living cells.

Research Frontier · Todayunsolved as of Oct 2026

  • A cell built from scratchopenUnsolvedNobody has yet assembled a living, dividing cell from non-living molecular parts.
  • Decoding animal communicationopenUnsolvedAI can sort and model animal sounds, but what a call means can only be tested on the animals; two-way exchange has been shown only in narrow cases.
  • Origin of lifeopenUnsolvedHow non-living chemistry became self-copying, evolving cells is still unknown.
  • Predicting traits from DNAopenUnsolvedWe cannot yet reliably say how a person's DNA turns into their traits and disease risks.
  • Simulating a whole cellopenUnsolvedNo one can yet compute how a complete living cell behaves from its molecules up, let alone a human cell.

If Solvedbecomes possible

  • Disease risk read from DNA2035?If solvedA newborn's genome gives reliable lifelong risk forecasts, and the main risks can be corrected by gene editing.
  • Designer organisms on demand2040s?If solvedMicrobes and cells are designed to order for medicines, materials, fuels and clean-up.
  • Digital twin of a patient2040s?If solvedA computer model of one person's cells and organs predicts how they will react to a drug before it is given.
  • Dialogue with another speciesopenIf solvedA two-way exchange with another species across several topics, shown by the animals' own responses and run under agreed safeguards.
  • Life made from chemistryopenIf solvedA living, evolving system is created in the lab from non-living chemicals, showing how life can start.