Thursday 4 July The Material World The microchips and disc drives in computers are becoming smaller and more powerful. Soon, however, the materials used will limit further reductions in size, so scientists are now looking at magnetism instead of electricity to continue the path of miniaturisation in computers. Would you Adam 'n Eve it? Quinten Cooper investigates.
BBC Radio 4, 4.30pm Discovery Magazine: Engineering Secrets The dome of Hagia Sophia in Istanbul is one of the largest structures in the world. How has this 800 year old structure managed to survive devastation and the elements through the centuries?
Discovery Sci Trek, 6pm Kew Bridge Steam Museum From today through to 7 July the museum plays host to a replica of the world's first car - Trevithick's 1801 road locomotive. Built by members of the Trevithick Society, this is the model's first appearance outside Cornwall and is part of a wider celebration of the great man.
Londoners, take your chance to see it now, before those Cornish folk take this treasured item back to their protective bosom.
Tel, (020) 8565 4757 www. kbsm. org Saturday Crossness Engines Trust Open Day Why not take a day out at Crossness and marvel at the world's largest rotating beam engines - described as a cathedral of ironwork. The Crossness pumping station was key to Joseph Bazalgette's plan to transform the health of London by building a vast sewer system that is still in use today. The trust is a charity and run by volunteers so don't be square daddio - head along and let 'em know you love 'em.
Admission £3 Abbey Wood, London. Tel (020) 8303 6723 www. crossness. org. uk Sunday Desert Island Discs - Alan Titchmarch I wonder if Sue Lawley's fawning style might make way for some fun over Alan's choice of records.
Favourite singer, Robert Plant, along with artists like the Hollies and Rose Royce, perhaps. Songs could be Green, Green, Grass of Home or (I Never Promised You A) Rose Garden or maybe he's into heavy petal. Did you know that Rose Garden was recorded by country singer Lynn Anderson?
Enough of this foolishness.
BBC Radio 4, 11.15am Tuesday Salvage Squad The challenge is to re-build a 1923 steam roller which has been stored in 2000 rusty pieces in a West Country yard. The aim is to completely restore the engine to full steam in ten days. Some Meccano set, readers.
Discovery Channel, 8.30pm Grundy Goes. . . By Road John Grundy looks back at what road travel used to be like and finds turnpikes, fords and bridges along the way.
Discovery Civilisation, 9.30pm