The second programme deals with the mechanics of flight. Getting into the air is by far the most exhausting of a bird's activities, and Sir Attenborough observes shearwaters in Japan that have taken to climbing trees to give them a good jumping-off point. The albatross is so large that it can only launch itself after a run-up to create a flow of air over its wings. A combination of aerodynamics and upward air currents (or thermals), together with the act of flapping or gliding is what keeps a bird aloft. Landing requires less energy but a greater degree of skill, particularly for a big bird, such as a swan. Weight is kept to a minimum by having a beak made of keratin instead of bone, a light frame, and a coat of feathers, which is maintained fastidiously. The peregrine falcon holds the record for being fastest in the air, diving at speeds of over 300 km/h. Conversely, the barn owl owes its predatory success to flying slowly, while the kestrel spots its quarry by hovering. However, the true specialists in this regard are the hummingbirds, whose wings beat at the rate of 25 times a second. The habits of migratory birds are explored. After stocking up with food during the brief summer of the north, such species will set off on huge journeys southwards. Some, such as snow geese, travel continuously, using both the stars and the sun for navigation. They are contrasted with hawks and vultures, which glide overland on warm air, and therefore have to stop overnight.

Andrew Graham-Dixon reveals how the Medici family transformed Florence through sculpture, painting and architecture and created a world where masterpieces fetch millions today. Without the money and patronage of the Medici we might never have heard of artists such as Donatello, Michelangelo or Botticelli, and Graham-Dixon examines how a family of shadowy, corrupt businessmen, driven by greed and ambition, became the financial engine behind the Italian Renaissance.

The sparkling blue waters of the Mediterranean Sea are home to over 700 varieties of fish and almost 10 per cent of the world's marine species. Its coastline is one of the most densely populated in the world and the human pressure on this sea is magnified each summer with the influx of holiday makers. Western civilisation developed around these shores but now human activity is having a profound effect on this endangered sea.

In 1996, the Menendez brothers' trial for the brutal murder of their parents shocked the nation and left a lasting mark on America's legal and cultural landscape. Now, decades later, this gripping documentary revisits the case that fascinated millions, providing unprecedented access to those closest to the brothers and the courtroom drama. Through exclusive interviews, newly uncovered details, and firsthand accounts, it sheds light on the motivations, emotions, and complex family dynamics that led to the shocking crime.
Lyle and Erik Menendez, serving life sentences in prison, break their silence to offer their perspective on the harrowing events that forever changed their lives. This documentary explores not only the chilling crime and sensational media coverage but also the brothers’ own reflections and the ongoing debate about justice, privilege, and the true nature of the tragedy. Prepare to witness a story of betrayal, power, and a search for answers that still haunts America to this day.

The metaverse is an environment where humans interact socially and economically through a software in cyberspace, which acts as a metaphor for the real world, but without its limitations. The metaverse is generally composed of multiple three-dimensional, shared and persistent virtual spaces linked to a perceived virtual universe. This virtual world is often facilitated by the use of virtual reality (VR) or augmented reality (AR) headsets and avatars. The Metaverse is the successor to the internet. It will change the lives of almost every human on the planet.

The series Secret History of Comics takes a deeper look into the stories, people and events that have transformed the world of comic books.
In the first episode, we will explore how Jack Kirby and Stan Lee invented Marvel's most beloved characters. Stan Lee and Jack Kirby are the Lennon and McCartney of Marvel Comics, and just like The Beatles, eons from now, people will still be talking about these characters and the people who created them, akin on the same level.