Nick Xenophon will refer himself to the High Court and his political future is in doubt after the shock discovery he is a British overseas citizen.
Julie Power A young scientist who discovered that sperm from male mice swim faster when fed sugar, and that when male sea squirts compete to produce sperm the resulting eggs are less likely to hatch, has won the Young Tall Poppy Science award.
Harriet Alexander Two of the victim's former girlfriends colluded to have him murdered, the Supreme Court has heard.
Tom McIlroy The official residences of the Australian prime minister will have new oversight from an expert group.
Trivia and word buffs: test your knowledge with today's superquiz and Target.
Judith Ireland, James Massola Early on Monday morning, Barnaby Joyce paid a visit to Nationals senator John Williams at his Parliament House office.
Noel Towell Gay marriage vote an "entirely inappropriate use" of money meant for emergencies, says former top public servant.
Kate McClymont, Ava Benny-Morrison, Rachel Olding Robby Melhem, once a major sponsor of the Manly Sea Eagles, has been refused bail after being charged over a major drug bust.
Tom McIlroy The Australian Pesticides and Veterinary Medicines Authority faces a "root cause" review of its operational performance.
Doug Dingwall The embattled agency endured another quarter of slowing work as its relocation drew closer.