ABC Science Online and triple j

Dry lightning and deja vu

Pee in the pool and spinning sperm

Your brain on music, with Daniel Levitin

Space elevators, black holes and time travel

Charges, cuts and stitches

Body temperature, blocked noses and itchy bites

Tired eyes and bush fires

Ice-cream headaches, hair and eye shape

Jet streams, killer pain and warm-weather wifi

Dr Karl answers some itchy questions