Take a look back at many of the most fascinating science stories of 2017, a year full of stunning advancements in individual fields of study, from astronomy to biology, geology to history – when we piece these discoveries together we see the year in a new light.

In episode two, Professor Brian Cox is off to India, where he assesses arguably the first evidence of rational thought in literature, the poetry of the Vedic monks. They pondered mankind's origins, realising there must have been a day with no yesterday - a day of creation - prompting the age-old question of where did the universe come from? Brian marvels that the universe seems to follow a set of rules, the laws of physics, allowing space to be considered on the grandest scale, travelling to the most distant, farthest reaches of the cosmos just by using our minds. Brian also visits Japan, and offers viewers the idea that man lives in just one of an infinite number of universes that are being made all the time.

‘Retrograde’ offers a deeply intimate account of the end of Americas's longest war and humanizes the individuals most impacted through both US and Afghan perspectives. With a character-driven, cinema-verite approach, the film functions as an up-close record of a turning point in American and Afghan history while also providing an emotional reminder of the human costs of war.
‘Retrograde’ focuses in the relationship between American Green Berets and the Afghan officers they trained.

The live concert also contain hits from Glenn Frey, Don Henley, and Joe Walsh's solo careers, and a few new songs as well, including Walsh's 'One Day at a Time' and 'Hole in the World,' Frey and Henley's moving, almost gospel-tinged reaction to the events of 9/11/01.
As for the somewhat cheeky title, well, there's always been a certain smugness to the Eagles' sense of humor, and it's no different this time, as Frey doesn't even pretend that there won't be a Farewell 2 Tour in the future. And why not? These are good songs, played beautifully by the quartet (plus supplemental musicians) to audiences that love them.

Thirty years ago, scientists first realized that some unknown dark substance was affecting the way galaxies moved. Today, they think there must be five times as much dark matter as regular matter out there. But they have no idea what it is - onl that it's not made of atoms, or any other matter we are familiar with. And Dark Matter is not the only strange substance in the Universe - a newly discovered force, called Dark Energy, seems to be pushing the very fabric of the cosmos apart.

Francisco de Orellana failed to find El Dorado, but discovered the Amazon. Early in 1541, a rumor swept Quito that beyond the mountains, there lay a land richer than Mexico, or even Peru - a land of gold. The ruler of this land was so rich that he covered himself with gold dust every day and washed it off every evening. He was "the golden man", El Dorado. They had tree goals: to find La Canela, the land of cinnamon: to assess new lands for colonization; and to find El Dorado. On march 1541, They marched eastwards with more that 200 Spanish troops and thousands of native servants.