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BBC News Tech Now HomeEpisodes define("branding-responsive-nav",[],function();return e.prototype=,setOptions:function(e);this.options=t},getOptions:function(),init:function()var t=this,n=null,i=this.getWindowWidth(),o=this.getWindowHeight();t.setupNavigation(),this.addListener(window,"resize",function())},getWindowWidth:function(){var e=0;return"number"==typeof window.innerWidth?e=window.innerWidth:document.documentElement&&document.documentElement.clientWidth?e=document.documentElement.clientWidth:document.body&&document.body.clientWidth&&(e=document.body.clientWidth),e},getWindowHeight:function(){var e=0;return"number"==typeof window.innerHeight?e=window.innerHeight:document.documentElement&&document.documentElement.clientHeight?e=document.documentElement.clientHeight:document.body&&document.body.clientHeight&&(e=document.body.clientHeight),e},addListener:function(e,t,n),setupNavigation:function(){if(this.local_nav_bar=document.getElementById("br-nav-programme"),null!==this.local_nav_bar){var e=document.createElement("button");e.className="br-nav__morelink br-box-highlight";var t=document.createTextNode(this.getOptions().more_link_text);e.appendChild(t),e.id="more-link",this.local_nav_bar.insertBefore(e,this.local_nav_bar.firstChild);var n=document.createElement("ul");n.id="more-list",n.className="br-nav__more br-nav__list",this.local_nav_bar.appendChild(n),this.addListener(e,"click",function()),t=null,this.processNavigation()}},processingNavigation:!1,processNavigation:function(){if(null!==this.local_nav_bar){var e=document.getElementById("more-link"),t=this.local_nav_bar.getElementsByTagName("ul");t=t[0];var n=t.getElementsByTagName("li"),i=n[0];this.processingNavigation=!0;var o=document.getElementById("more-list");if(null!==o)for(;o.hasChildNodes();)t.appendChild(o.firstChild);if(!this._navIsTooLong(t,i))return e.className=e.className.replace("visible",""),void(e=t=n=i=o=null);for(e.className=e.className.replace("visible",""),e.className+=" visible";this._navIsTooLong(t,i)&&this.processingNavigation;)this._moveLastNavItem();e=t=n=i=o=null}},_moveLastNavItem:function(),_navIsTooLong:function(e,t)},e}); /**/ Main content Sorry, this episode is not currently available 25/04/2026 Tech Now Alasdair Keane visits an underground insect farm turning food waste into animal feed. Shiona McCallum tours behind the scenes at Blenheim Palace where tech aids Unesco World Heritage restoration. Show more Alasdair Keane visits the underground insect farm turning food waste into animal feed.

Shiona McCallum takes a tour behind the scenes of Blenheim Palace to see how new technologies are playing a key role in the restoration of the Unesco World Heritage. Yasmin Morgan-Griffiths explores how research linking climate change and extreme weather events is being used in lawsuits against major polluters. And Martin Sharkey takes a journey into the history of the emoji.

Show less 23 minutes Last on News More episodes Previous 08/04/2026 Next 29/04/2026 See all episodes from Tech Now Broadcasts News News except UK & UK HD News News Show more / Show less Related Content Similar programmes By genre: Factual > Science & Nature > Science & Technology By format: Magazines & Reviews Home Schedule TV Guide require(['rv-bootstrap']); ,,],"@context":"https:\/\/schema.org"} {"@type":"TVEpisode","identifier":"m002vtqb","episodeNumber":null,"description":"Alasdair Keane visits the underground insect farm turning food waste into animal feed.","datePublished":"2026-04-25","image":"https:\/\/ichef.bbci.co.uk\/images\/ic\/480xn\/p0kxxp17.jpg","name":"25\/04\/2026","url":"https:\/\/www.bbc.co.uk\/programmes\/m002vtqb","partOfSeries":{"@type":"TVSeries","image":"https:\/\/ichef.bbci.co.uk\/images\/ic\/480xn\/p0kxxp17.jpg","description":"Tech Now explores the latest innovations and technologies shaping our lives.","identifier":"m0029b3v","name":"Tech Now","url":"https:\/\/www.bbc.co.uk\/programmes\/m0029b3v"},"@context":"https:\/\/schema.org"}