Sir George Julius's Automatic Totalisator, first used by the public in New Zealand, and quickly taken up by racetracks throughout Australasia and North America (warning hideous HTML), automates parimutuel betting.
Matthias Wandel's astounding wooding calculatory enigma. A woodworker turns his talents to binary mathematics via a cunning series of cats-eyes, clinkers and rounders. Plus many other marbled wonders. [this might be marbles]
Australia is well known for having more than it's share of dangerous wildlife. However only a few examples are well known outside of the continent. The funnelweb spider might be Australia's most infamous horror. But the redback (a relative of the American black widow) and mouse spider both deserve your respect as well. Long hyped as causing severe ulceration, the reputation of the white-tailed spider might not be as deserved but is still a spider of concern. (more inside...)