U.S. President Barack Obama will on Monday be chief guest at India's Republic Day parade, a spectacular projection of the nation's military might and cultural diversity.

Here are five things you need to know about India's 66th Republic Day:

For generations, traders and their colorful herds of mules and yaks were a lifeline for remote communities in the heart of Nepal's formidable and often dangerous Himalayas.

The traders bravely plied an ancient trail, ferrying salt, grains and other goods between neighboring China's vast Tibetan plateau and Nepal's middle hills, a profession that endured for centuries.

Britain on Saturday marked the 50th anniversary of the death of Winston Churchill, the iconic cigar-chomping prime minister who led his nation in defying Nazi Germany during World War II.

Churchill, who died aged 90 on January 24, 1965, was Britain's prime minister through the war years of 1940 to 1945, and again in peacetime from 1951 to 1955.

Just months before the 50th anniversary of the heavyweight rematch between Muhammad Ali and Sonny Liston, boxing fans are getting a chance to own a piece of one of the most hotly debated title fights of all time.

Both pairs of gloves from the May 25, 1965, bout in Lewiston, Maine — won by Ali with a first-round knockout from what some saw as a "phantom punch" — go up for auction Feb. 21 in New York. They are expected to fetch more than $1 million.

Suddenly, science is sexy. With Benedict Cumberbatch nominated for multiple trophies as Alan Turing and Eddie Redmayne turning heads as Stephen Hawking, young British actors playing scientists are all the rage this awards season.

So it's good timing for the Royal Shakespeare Company, whose new play, "Oppenheimer," features rising star John Heffernan as American scientist J. Robert Oppenheimer, leader of the team that developed the first nuclear weapon.

The liberation of the Nazi concentration and death camps came as World War II drew to a close, as allied forces advanced on Berlin -- the Soviet Red Army from the east and the Americans and other allies from the west.

There is, however, a distinction between the actual "liberation" of the camps and the "evacuations", a complex process under which in the last year of World War II the Nazis transferred prisoners from camp to camp in what is know as the "death marches" in a bid to cover up their atrocities.

Danuta Roman is channeling her inner Vincent van Gogh. She applies short brushstrokes of azure, turquoise and Payne's grey to mimic water reflections on an oil painting by the Dutch master.

"I'm trying to figure out how he created this landscape," says the 42-year-old painter as she studies an 1887 canvas with the Seine river and a scene outside Paris.

An Egyptian conservation group said Friday it will sue the antiquities minister over a "botched" repair of the mask of King Tutankhamun that left a crust of dried glue on the priceless relic.

The golden funerary mask, seen Friday by AFP at the Egyptian Museum, showed the sticky aftermath of what appears to have been overzealous use of glue to fix the mask's beard in place.

Seventy years after the liberation of Auschwitz-Birkenau -- the infamous Nazi camp which has come to symbolize the Shoah -- Poles still bristle at the erroneous phrase "Polish death camps" when people talk about the wartime genocide of European Jews.

Six million Polish citizens, half of whom were Jewish, perished under German occupation during World War II.

Libby Lane becomes the Church of England's first female bishop on Monday despite entrenched opposition from traditionalists, who say that the clergy's top rung is no place for a woman.

Lane, 48, will go from being a regular parish priest to taking on one of the trickiest jobs in the Church of England since King Henry VIII founded it in 1534.