PulseProject is an interesting collection of video lectures and podcasts in science. It is aimed at university and IBDP-level (or A-level) students and educators as well as the general (well informed) public. Looking through their list of lectures and videos, there is some leaning towards eugenics and psychology, though there are many that might be of specific interest to IB Biology students:

Genetics & Evolution:

GM Crops and global food security Chris Leaver

Where did you leave your genetic fingerprint? Katharine Wright

Genes and Human History Gil McVean

Descent of the Dinosaurs Chris Jarvis

Music of Life: a new view on nature and nurture Denis Noble

What makes us human? Robin Dunbar

The practice of Eugenics in Estonia Ken Kalling

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Ecology:

Saving the Asian Apes (Indonesia link!) Susan Cheyne

Exploring the Ecology of Insects Mike Bonsall

Seven Years to Save the Planet (Climate Change) Bill McGuire

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And some bits from our heroes:

Ben Goldacre at Skeptics in the Pub

Marcus du Sautoy on A mathematician’s journey through symmetry

Ruchard Wiseman (the Quirkology guy) on the luck factor