284. Sorry Mr. Sobieski this is not for you...

The Bagel.

283. Horny Heave ho!

The instrument is the Botswain's whistle - the artifact is called the Bosun's chair.

282. 10 Ideas changing the world right now....

Amortality (Amoral + Immortality)

281. Incestuous relationships...

The White Tigers of Rewa

280. Pride, Prejudice and then some more...

Zombies (the book is a retelling of the classic with the minor difference that all the characters are zombies now...)

279. Bring on the cheergirls?

Elvis has left the building.

278. Whatsizname?

In the name of the Father.

277. Dances with shoes?

Christina Ricci

276. What, no sports?

Only people to win Olympic medals competing under the banner of the Olympic flag.

275. Vexillologically vexed?

The Kingdom of Sikkim (India)

274. The noble laureates who flunked....

The group was termed the "Termites". After Lewis Terman, who devised the IQ test.

273. Meal of Meals?

The Arrowroot.

272. pre-Fedex times in the Dark Continent

Dr Henry Livingstone's dead body.

271. Encore! after two centuries...

The first time was for the opening of the La Scala in Milan. Second time around for the re-opening of the La Scala post restoration.

270. Ask your mom.....

This pattern is called the Sunbonnet Sue.