Summarize the following text. Valentina Tereshkova was born in a village, in Central Russia on 6 March 1937. Her father was a tractor driver and her mother worked in a textile plant. At the age of eight she began her schooling but did not enjoy it much. She left the school within a few years. Afterwards she completed her education through distance learning. She became interested in parachuting from a young age, and trained in skydiving at the local Aeroclub, making her first jump at age 22 on 21 May 1959. It was her expertise in skydiving that led to her selection as a cosmonaut.After the flight of Yuri Gagarin, the first human being to travel to outer space in April 1961, the Soviet Union decided to send a woman in space. On 16 February 1962, "proletaria" Valentina Tereshkova was selected for this project from among more than four hundred applicants. Tereshkova had to undergo a series of training that included weightless flights, isolation tests, centrifuge tests, rocket theory, spacecraft engineering, 120 parachute jumps and pilot training in MiG-15UTI jet fighters. Since the successful launch of the spacecraft Vostok-5 on 14 June 1963, Tereshkova began preparing for her own flight. On the morning of 16 June 1963, Tereshkova and her. back-up cosmonaut Solovyova were dressed in space-suits and taken to the space shuttle launch pad by a bus. After completing her communication and life support checks, she was sealed inside Vostok-6. Finishing a two- hour countdown, Vostok-6 launched faultlessly. Although Tereshkova experienced nausea and physical discomfort for much of the flight, she orbited the earth 48 times and spent almost three days in space. With a single flight, she logged more flight time than the combined times of all American astronauts who had flown before that date. Tereshkova also maintained a flight log and took photographs of the horizon, which were later used to identify aerosol layers within the atmosphere. Vostok-6 was the final Vostok flight and was launched two days after Vostok-5, which carried Valary Bykovsky into a similar orbit for five days, landing three hours after Tereshkova. The two vessels approached each other within 5 kilometers at one point, and from space Tereshkova communicated with Bykovsky and the Soviet leader Khrushchev by radio.