Dr Alice Roberts re-traces the greatest ever journey taken by our ancestors. Thousands of years ago one small group of our species, Homo sapiens, crossed out of Africa and into the unknown. Their descendants faced baking deserts, sweat-soaked jungles and frozen wildernesses and risked everything on the vast empty ocean. Within 60,000 years they colonised the whole world... How did they do it? Why do we, their descendants all look so different?

Journey through the long-vanished corners of prehistoric North America, beginning when man first entered the vast, unspoiled continent some 14,000 years ago, in this appealing BBC documentary. Witness ancient beasts, mammoths, mastodons, giant bears, and sabre-toothed cats, and see the legacies each has passed to their modern successors. Computer animation and digital effects bring to life mammoths, saber-toothed cats, giant ground sloths, short-faced bears, glyptodonts, and a plethora of smaller animals in a lush Ice Age mosaic. Discoveries from sites across America are the basis for the reconstructions.

Of all the objects in the cosmos, planets, stars, galaxies, none are as strange, mysterious, or powerful as black holes. Black holes are the most mind-blowing things in the universe. They can swallow a star completely intact. Black holes have these powerful jets that just spew matter out.
First discovered on paper, on the back of an envelope, some squiggles of the pen. The bizarre solution to a seemingly unsolvable equation, a mathematical enigma. Einstein himself could not accept black holes as real. People didn't even believe for many years that they existed. Nature doesn't work that way. Yet slowly, as scientists investigate black holes by observing the effect they have on their surroundings, evidence begins to mount.

Set in the wilderness of the Kamchatka Peninsula, the land of legends and the kingdom of wild brown bears, we follow the daily adventures of five wild brown bears. A mother bear and her two young ones, an adolescent male and an experienced male leader. Each of them have their own concerns and preoccupations. The mother must feed and protect her cubs, whilst all they want is to explore the big wide world out there, unaware of the dangers that lie ahead of them. The adolescent is coming of age and must find his place in the adult world, whereas the experienced male must constantly defend his supremacy and impose his strength.

In recent years, close study of the aging process has opened up new ways that could help us all live healthier for longer. Can we move beyond treating individual diseases, and instead treat the aging process itself? But would a longer life necessarily be a better life? A loose-knit group of researchers believe the real breakthrough is extending our health span - the period of life spent free of disease". Hear from Laura Deming, who dropped out of M.I.T. at the age of 14 and committed herself to finding and funding projects that can expand the human health span, and Dr. Brian Kennedy, whose work in the basic biology of aging has been crucial to the development of countless other researchers' work.

Brian Jones, Jimi Hendrix, Janis Joplin and Jim Morrison all died at the age of 27 between 1969 and 1971. At the time, the coincidence gave rise to some comment, but it was not until the death of Kurt Cobain, about two and a half decades later, that the idea of a '27 Club' began to catch on in public perception, reignited with the death of Amy Winehouse in 2011.
Through interviews with people who knew them, such as music stars, critics, medical experts and unseen footage, the lives, music, and artistry of those who died at 27 are investigated with a bid to find answers.