2010s and were referenced or used in pop culture during the decade. In 2018, during the Falcon Heavy test flight, the first production car was launched into space. The car was attached to the Falcon Heavy rocket, the most powerful rocket in operation at the time. Cyber security and hacking Cyber security incidents, such as hacking, leaks or theft of sensitive information, gained increased attention of governments, corporations and individuals. Health and society AIDS, a pandemic responsible for killing over 30 million people since its discovery in the early 1980s, especially in sub-Saharan Africa, became a treatable condition, though by the end of the decade only two cases had been cured. With good treatment patients can generally expect normal lives and lifespans. However, only some 5 million of the 12 million affected people had access to such treatment. During the 2010s, social changes included increases in life expectancy and falling birth rates leading to larger proportions of the population being elderly. This put pressure on pensions and other social security programs in developed nations. The environment became a topic of greater public concern around the world. Many parts of the world moved towards greater acceptance of LGBT people often including the legalisation of same-sex marriage. The internet took an ever greater role in entertainment, communication, politics and commerce, especially for younger people and those living in wealthier countries. In 2011, the world population reached seven billion people. Popular culture Fashion Fashion of the 2010s became slimmer-fit and slightly more formal compared to previous decades. In addition, people's handheld devices such as cellphones (and their colorful cases), selfie sticks (for a brief period during the middle of the decade), tech-like Beats headphones, smart watches, wired and by the end of the decade wireless ear-buds, as well as handheld gaming systems became more prevalent personal items. The decade was also defined by new hipster fashion (hipster styles were marked by the wearing of knit beanies, checkered shirts, and clothes from thrift stores; as well as hobbies like horticulture, photography, and specialty coffee) athleisure, and a revival of austerity-era and other nostalgic alternative fashion trends (such as 1980s-style neon streetwear and unisex 1990s-style elements influenced by grunge). In 2018, a subculture of "e-kids" came into existence, whom took their style from Japanese street fashion, cosplay, skater aesthetic, and other pieces of pop culture. In contrast to the colorful subculture of "e-kids" later in