Social history

Risking my life to protect Congo's rainforest. Video, 00:03:58Risking my life to protect Congo's rainforest

Million dollar idea: The dog biscuit. Video, 00:01:24Million dollar idea: The dog biscuit

Why did we shun electric buses 50 years ago?

Northern England's disused mills 'at risk'

The challenges in bringing disused mills back to life. Video, 00:01:22The challenges in bringing disused mills back to life

Million dollar idea: The executive toy. Video, 00:01:26Million dollar idea: The executive toy

Murder in the Amazon. Video, 00:04:03Murder in the Amazon

'Without coal Wales would be part of England'

Million dollar idea: The Christmas cracker. Video, 00:01:30Million dollar idea: The Christmas cracker

Million dollar idea: The snow globe. Video, 00:01:24Million dollar idea: The snow globe

How a schoolboy project is inspiring Hollywood

The forgotten mining disaster attracting Hollywood. Video, 00:01:58The forgotten mining disaster attracting Hollywood

Million dollar idea: The egg box. Video, 00:01:13Million dollar idea: The egg box

Million dollar idea: Sticking plasters. Video, 00:01:13Million dollar idea: Sticking plasters

WW1 soldier 'reunited' with family

'Library in the wilderness' kept dry by hydropower. Video, 00:01:17'Library in the wilderness' kept dry by hydropower

Million dollar idea: The trampoline. Video, 00:01:19Million dollar idea: The trampoline

Million dollar idea: Trainers. Video, 00:01:23Million dollar idea: Trainers

Preserving Senegal's culture through art. Video, 00:03:14Preserving Senegal's culture through art

Welsh history needed to teach 'our national story'

How a postcard inspired visit to soldier's grave