Here are a few I have listened to regularly for the past few years:
Science Hour (BBC) - "Science news and highlights of the week" - a weekly report of five or so good science stories.
Science in Action (BBC) - "...brings you all the week's science news" - shorter than the above, some overlap but good additional stories.
and a more recent find:
Astronomy Cast - More technical than those above, each episode has a theme. Good science plus astronomy updates.
These can easily be found using standard podcast apps.