The 2016 Summer Games represents a showdown between China, which won six gold medals at the 2012 London Olympics, and the United States, which came in second with four medals.
Did you know women weren't allowed to compete at the first Olympic Games?
European comedian Eddie Izzard revealed plans to run for run office in the UK's NEC election.
The genetic structure responsible for causing autism in humans was missing in Neanderthals, making them immune to the disorder, a new study has found.
Samba dancers, models and the theme of sustainability will be present for Friday's festivities.
The Rio Olympics aren’t as expensive as London but the Games come at the worst economic moment for Brazil.
A new study suggested that acupuncture showed promising results for people dealing with incipient dementia.
Scientists found that Amish children have an immune system which, due to frequent exposure to germs, is stimulated to produce more white blood cells to fight infections.
Police made several arrests as protesters caused traffic congestion at the busiest airport in Europe.
The Solar and Heliospheric Observatory saw a bright comet, which would usually whip around the sun, get torn apart and vaporized.
Multi-ethnic Singapore has an image as one of the safest countries in the world.
According to a new study, a genetic mutation may have helped early humans adapt to smoke exposure, giving them a clear advantage over their Neanderthal ancestors.
The U.S. abandoned a military base in Greenland in 1967, assuming its toxic and radioactive wastes would stay buried under snow forever.
Luxury brands like Gucci and Yves Saint Laurent had filed the suit in 2015 against the Chinese e-commerce giant in a U.S. court.
Researchers have found evidence backing the Chinese legend, which says that Emperor Yu tamed the waters of a great flood and established the Xia dynasty.
The 21-member committee voted on Thursday to put suspended Brazilian President Dilma Rousseff on trial for breaking budget laws.
The group called General Foundation for Prisoners' Affairs has demanded release of prisoners in exchange for the bodies of five people shot down in a Russian helicopter.
Zakaria Bulhan killed one American women in a stabbing attack in central London.
Darlene Horton was among six people stabbed during the incident.
It's a race to the starting line for the Nigerian Olympic men's soccer team.
A team of researchers find that middle-aged obese individuals have an "older" brain than their leaner counterparts.
A white lioness named Cleopatra gave birth to three cute cubs in Tbilisi, Georgia.
Strong winds and rough seas have prevented investigators from finishing scanning the 120,000-square-kilometer search area.
"Hurricane" Earl has been officially reduced to a tropical storm just as it makes way in Belize.
Venezuela's reserves have fallen as the struggling economy faces upcoming debt repayments.
"This is only the beginning, and our meeting [will be] in Rome and Beit Al-Maqdis [Jerusalem]," the narrator says.
Ninorta Banho became the first refugee to be crowned “wine queen” in Germany’s Trier-Olewig region.
A community group is booking out a water park for one day for Muslim women who want to wear “burkinis,” a swimming garment covering the whole body except the face, hands and feet.
A team of researchers has released a catalogue 216 planets discovered by NASA's Kepler telescope, including 20 that are most likely to resemble Earth.
Red-breasted frigatebirds sleep for an average of 41 minutes per day, even when they are in flight, taking quick 12-second naps usually using only half their brain.