Problem: Flowering plant:

The great angiosperm radiation, when a great diversity of angiosperms appears in the fossil record, occurred in the mid-Cretaceous (approximately 100 million years ago). However, a study in 2007 estimated that the division of the five most recent (the genus Ceratophyllum, the family Chloranthaceae, the eudicots, the magnoliids, and the monocots) of the eight main groups occurred around 140 million years ago. By the late Cretaceous, angiosperms appear to have dominated environments formerly occupied by ferns and cycadophytes, but large canopy-forming trees replaced conifers as the dominant trees only close to the end of the Cretaceous 66 million years ago or even later, at the beginning of the Tertiary. The radiation of herbaceous angiosperms occurred much later. Yet, many fossil plants recognizable as belonging to modern families (including beech, oak, maple, and magnolia) had already appeared by the late Cretaceous.

When did the division of the eight main groups of angiosperms occur?
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A: 40 million years ago

Problem: Muammar Gaddafi:

Gaddafi was a very private individual, who described himself as a "simple revolutionary" and "pious Muslim" called upon by Allah to continue Nasser's work. Reporter Mirella Bianco found that his friends considered him particularly loyal and generous, and asserted that he adored children. She was told by Gaddafi's father that even as a child he had been "always serious, even taciturn", a trait he also exhibited in adulthood. His father said that he was courageous, intelligent, pious, and family oriented.

Whose efforts did Gaddafi see himself as continuing?
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A: Nasser

Problem: Antarctica:

The first semi-permanent inhabitants of regions near Antarctica (areas situated south of the Antarctic Convergence) were British and American sealers who used to spend a year or more on South Georgia, from 1786 onward. During the whaling era, which lasted until 1966, the population of that island varied from over 1,000 in the summer (over 2,000 in some years) to some 200 in the winter. Most of the whalers were Norwegian, with an increasing proportion of Britons. The settlements included Grytviken, Leith Harbour, King Edward Point, Stromness, Husvik, Prince Olav Harbour, Ocean Harbour and Godthul. Managers and other senior officers of the whaling stations often lived together with their families. Among them was the founder of Grytviken, Captain Carl Anton Larsen, a prominent Norwegian whaler and explorer who, along with his family, adopted British citizenship in 1910.

What was the profession of the residents of South Georgia?
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A: sealers

Problem: Chinese characters:

While new characters can be easily coined by writing on paper, they are difficult to represent on a computer they must generally be represented as a picture, rather than as text which presents a significant barrier to their use or widespread adoption. Compare this with the use of symbols as names in 20th century musical albums such as Led Zeppelin IV (1971) and Love Symbol Album (1993); an album cover may potentially contain any graphics, but in writing and other computation these symbols are difficult to use.

What has their been a prominent supply of in the 20th century?
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A:
symbols