2005 and earlier
    Water – an unusual liquid;      Atomic particles;      Digital Photography;       Motor Vehicles; Telephone Technology; Canal Boat Lifts;     Food Additives;       Building Technology;     The First Transatlantic Cable; The moon and tides;      Structural Fire Protection;     Bridges;     Aircraft Fuel Systems;    Nuclear Power;     Perspective in Art;        The Uses of Satellites;      Catastrophe Theory;     The Electricity Distribution Network; Pi; Social Insects; Tsunamis; A Walk along the Seashore;  Viruses;       
2006
Ripening of Tomatoes;     Energy for the Future;    New Horizons in the Solar System;   Let’s Build a Computer;     Parts of the body;        Anti-oxidants;        The sounds of music;         Fire-fighting hovercraft;        Power station efficiency;       The Human eye;     Home automation;    Male and female brains;                
2007
All fingers and thumbs;             Escaping from submarines;      “The Blind Watchmaker”;             Saving electricity in the home;              Bionic man;         Prime numbers;             Radar;                   Local weather records;                   Hydraulic ram pumps;    London underground;                 Air navigation;             The human eye;                  The Severn Barrage;
2008   
100 years of electronics;              Nano-technology ;         Nutrition;   Ford Model T – to the Prius;   Human Brain;    Antarctica ecology;    Thomas Telford;        Neuroscience;   Imaginary numbers;   Clocks & Calendars;    Mazes & Puzzles;    Biometrics;    
2009
Why we don’t live for ever;    British Coal Mining Industry;    Science of Air Combat;   Charles Darwin;     Better Broadband;    Sir Goldsworthy Gurney;    Science Festival;  Practical Creativity;   Early Metallurgy; The Elements;  What our Fingers Tell us;   
2010    
Red Blood Cells;        GPS;        Wine Science;    Climate Change;   Everyday Things;   Science Festival;   Galapagos;      I don’t know – do you?;    Science, Technology and Learning;       You’re never out of touch;   History of Aspirin;         Paper Sizes;   Flash Memory;      Book Reviews

 2011
Dowsing;        Electronic Displays;        Evolution of Software;   History of Sound Recording;   Madagascar;  European Orchids;  Why do we act that way?  Rare Earth Elements;  Fokker Trimotor;  Battery Technology;  Wine Faults;  Silicon;  End of the Heat Engine Age;  Fleming & Penicillin

2012
Anatomy of the Earth;      Engineers from the North-East;     Cardiff Naturalists;       Illumination;         History of Chemistry;       Stardust – Elements from the Stars;      Taxonomy of Flowering Plants;       Solar Panels (BCL Energy);       A Sketch of Atomic Structure ;      Raspberry Pi;        Pythagorean Tipples (!);       Diabetes and Obesity

2013

Richer Sounds talk; Cosmology; How fast is too fast;  Numbers & Infinity; Alan Turing;  Gene Sequencing;  Augmented Reality; Volcanos;  Jam;  Who or what makes your Decisions ; Strepy-Thieu Boat Lift ; Future of Nuclear Energy;  Mazes;  Biscuits;  Our Robot

2014

100 years of Inventions;  Arsenic;  Large Scale Storage of Electricity;  Bread; British Aeronauts;  Cryptography;  Static Electricity;  Science and Truth; Flying Egg-Beaters;  The Future of Work;  16 Exciting things to do with your Phone before Breakfast

2015

 Running a Small Technical Business;  The Plight of the Honey Bee;  The Art of Technology;  The Other Wright Brothers;  {Morris) Minor Themes;  Pascal’s Triangle;  Genetic Inheritance;  How to Beat the Bookies;  Saws;  Maths of Piano Tuning;  Audiology;  Perpetual Motion;  Mt. Isa Lead Mine ;  BOGOF – for beginners!

2016

Microbiology – friend or foe;  James Nasmyth; Flying High, Diving Deep; History of Industrial Revolution in 8 Objects;  Amazing Brain;  Food Diet and Health;  Submarine Accidents;  Natural History;  Water;  Saving Petrol; LED  Street Lighting;  Driverless Vehicles

2017

6 Revolutions in Biology;  Avro Vulcan/Blue Steel;  Let’s Build a Computer; Bookbinding;  About Time;  Gene Editing;  Energy from Food Waste; Industrial Archaeology;  Hay Tor Tramway;  Handley-Page;  Our Future; Your Christmas Tipple

2018

Names of Elements  Brunelleschi’s Duomo;  A.I. in Combat;  Isaac Peral; Computer Pioneers;  Weather;  Flying the Phantom;  Your Digital Footprint; Maths in Early Space Travel;

2019

Extraordinary Materials; Funky Fungi; Going with a Bang; Post-War Military Equipment; G.M.Foods; 737 Max – Why?;  Nuclear Reactor Technology; Flighty Ladies;  Butterflies;  Mobile Phones – where are we now?;  Science of Santa

2020

Mind the Gap;  Popcorn materials; Porcelain; NHS Technology; Cutting carbon; Directional Drilling; Coronavirus; Sleep; Mitochondria; He Lit the Lamp (A.M.Low); Internet of Things; Flying Egg-Beaters; Photo-Synthesis; Neutrino Physics

2021

Home Automation; Stellar Evolution; Energy Storage; Limestone Geomorphology; The M.G.; Radio Communication;  The Yang/Lee Nobel Prize; Technology of Intelligence Gathering;  What’s the Point of Hinkley;  Babbage’s Idea and Ever Onward;  Moving away from Hydrocarbons;  Climate Change

2022

Tardigrades; Nuclear Fusion; What is Life?; Decarbonising Industry; Human Immune System; Heat Engines; Neural Networks; Numbers, Real or Imagined; James Webb Telescope; Exercise in the prevention of Alzheimer’s disease; Greening the Web; Conway’s Calendar Algorithm

2023

When the Immune System Goes Wrong; The Large Hadron Collider; Computerising the OED; Order and Chaos in the Solar System; The Scientific Revolution and the Enlightenment; Early Astronomers; The Lunar Men; Left-handedness; Isaac Newton; Linnaeus; Global Navigation Satellite Systems