Nirvana is an important concept in Buddhism and Jainism. Buddha described Nirvana as a perfectly peaceful state of mind and highest happiness.
Back in the real world, human cloning remains a highly controversial subject, although scientific advances see the possibilities drawing closer.
Global warming is the increase in temperature of the Earth's near surface air and seas. Through much of the twentieth century, increases in temperature were recorded, and it is widely believed that the rise was the result of human-caused CO2 emissions leading to the Greenhouse Effect.
Possible consequences include the warming of the Arctic, the melting of ice caps and permafrost, rising sea levels, expanding deserts, species extinction and extreme weather.
The Cape Cod style of housing originated in New England in the 17th century. Small economical Colonial Revival houses became popular in America in the 1930s.
The Georgian architectural style dates from the period 1720-1840: an elegant, formal style which later become popular in America.
A common superstition demands that when given a knife as a gift, one should pay the giver a token sum in order that the relationship is not severed.
"I coulda been a contender" is a quote from the 1954 film On the Waterfront starring Marlon Brando as an ex-prize fighter working on the docks.
The Dot Com Bubble was the short-lived stock market boom in the late 1990s, driven by ridiculous valuations of Internet businesses with no proven business model.