The Internet and time – how the World Wide Web has transformed our understanding of history as well as the future. Laurie Taylor talks to Jason Steinhauer, public historian and Global Fellow at the Wilson Centre, Washington, DC, whose latest study argues that the tangled complexity of history that we see via Instagram and Twitter is leading to an impoverished, even a distorted knowledge of the past. Algorithms play in a big role in determining the versions of history which we are seeing. Content does not rise to the top of news feeds based on its scholarly or factual merits. Political agendas and commercial agendas are almost always at play. So how can we become more discerning consumers of historical knowledge? They're joined by Helga Nowotny, Professor Emerita of Social Studies of Science a ETH Zurich, whose research suggests that our dependence on predictive algorithms might be closing down the horizon of our future, giving us a feeling of control whilst narrowing our choices. Producer: Jayne Egerton