Grow it Yourself (GIY): A presentation by GIY, a registered charity which aims to inspire people to grow their own food. Terenure Library, Dublin, 7pm.
Mate Choice: Is Sex Really Mean?Dr James McInerney on courtship and displays of affection among animals. NUI Maynooth, 7pm. Admission is free.
TOMORROW
ISTA Senior Science Quiz:The regional finals of the Irish Science Teachers' Association quiz, in 11 venues involving hundreds of Leaving Certificate students. For more details log on to the website www.ista.ie.
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Mountains in the Sea:An illustrated talk on the bird life, ecology and culture of the volcanic island Tristan Da Cunha by Brad Robson, 8pm, Sligo Institute of Technology.