Problem: The ABS plastic used in the casing of some older SNES and Super Famicom consoles is particularly susceptible to oxidization on exposure to air, likely due to an incorrect mixture of the stabilizing or flame retarding additives. This, along with the particularly light color of the original plastic, causes affected consoles to quickly become yellow; if the sections of the casing came from different batches of plastic, a "two-tone" effect results. The color can sometimes be restored with UV light and a hydrogen peroxide solution.
Why would some SNESes be only partly yellow?
The answer is the following: if the sections of the casing came from different batches of plastic

Problem: During his voyage, Cook also visited New Zealand, first discovered by Dutch explorer Abel Tasman in 1642, and claimed the North and South islands for the British crown in 1769 and 1770 respectively. Initially, interaction between the indigenous Maori population and Europeans was limited to the trading of goods. European settlement increased through the early decades of the 19th century, with numerous trading stations established, especially in the North. In 1839, the New Zealand Company announced plans to buy large tracts of land and establish colonies in New Zealand. On 6 February 1840, Captain William Hobson and around 40 Maori chiefs signed the Treaty of Waitangi. This treaty is considered by many to be New Zealand's founding document, but differing interpretations of the Maori and English versions of the text have meant that it continues to be a source of dispute.
What is New Zealand's native population called?
The answer is the following: Maori

Problem: This large collection of meteorites allows a better understanding of the abundance of meteorite types in the solar system and how meteorites relate to asteroids and comets. New types of meteorites and rare meteorites have been found. Among these are pieces blasted off the Moon, and probably Mars, by impacts. These specimens, particularly ALH84001 discovered by ANSMET, are at the center of the controversy about possible evidence of microbial life on Mars. Because meteorites in space absorb and record cosmic radiation, the time elapsed since the meteorite hit the Earth can be determined from laboratory studies. The elapsed time since fall, or terrestrial residence age, of a meteorite represents more information that might be useful in environmental studies of Antarctic ice sheets.
Beside rare types of meteorites, what other types of meteorites have been found in Antarctica?
The answer is the following: New types

Problem: On June 12, 1990, the Congress of People's Deputies adopted the Declaration of State Sovereignty. On June 12, 1991, Boris Yeltsin was elected the first President. On December 8, 1991, heads of Russia, Ukraine and Belarus signed the Belavezha Accords. The agreement declared dissolution of the USSR by its founder states (i.e. denunciation of 1922 Treaty on the Creation of the USSR) and established the CIS. On December 12, the agreement was ratified by the Russian Parliament, therefore Russian SFSR denounced the Treaty on the Creation of the USSR and de facto declared Russia's independence from the USSR.
On what date was the Declaration of State Sovereignty adopted?
The answer is the following:
June 12, 1990