Could we finally be about to crack this source of potentially unlimited clean energy?
Hydrogen (H) - fusion
Why does iodine deficiency still blight children in developing countries like India?
The shiniest and showiest of metals has some surprisingly modern applications.
The poison in everything from paint and sweets, to telegraph polls and drinking water.
Platinum group (Pt, Pd, Ru, Rh, Os, Ir)
Six rare metals that clean the air but are the focus of violent conflict in South Africa.
This metal offers thousands of years of nuclear energy, but is it any safer than uranium?
Why do we value this useless metal? And does it bring out the worst in human nature?
In the final programme in the series we look at the rarest members of the periodic table.
Elaine Mitchell takes a weekly look at farming, food and countryside issues.
Rewilding, Snorkeling and Community Woodland
Mark Stephen and Kim McAllister with the latest outdoor activities.
Gerallt Pennant a'i westeion yn trafod natur, bywyd gwyllt a chadwraeth.
New Man At The Woodland Trust
Ian McCurley is the new director of Woodland Trust NI . Anne Marie met him at Ness Wood.
Snorkelling, satellites, water fountains and dealing with human poo responsibly.
Mark Stephen and Kim McAllister with stories from around Scotland.