Fighting has resumed in Gaza after the seven-day temporary ceasefire between Israel and Hamas ended. We ask a member of Hamas politburo about the reasons for the end of the temporary ceasefire and about the remaining hostages.

Also in the programme: world leaders agree to tackle the huge carbon footprint of food and agriculture; and how penguins have perfected the “power nap”.

(Photo: Israeli soldiers ride in an armoured personnel carrier (APC), after a temporary truce between Israel and the Palestinian Islamist group Hamas expired. Credit: Reuters.)