Attenborough's Wonder of Song
Channel: BBC Earth (DStv 184)
TX Time: 16h10
Genre: Documentary, Nature, Wildlife
Sir David Attenborough chooses his favourite recordings from the natural world that have revolutionised our understanding of song.
Each one - from the song of the largest lemur to the song of the humpback whale to the song of the lyrebird - was recorded in his lifetime.
When Sir David was born, the science of song had already been transformed by Charles Darwin's theory of sexual selection: singing is dangerous as it reveals the singer's location to predators, but it also offers the male a huge reward, the chance to attract a female and pass on genes to the next generation.
Hence males sing and females don't.
Today, new science in the field of birdsong is transforming those long-held ideas.
Scientists are discovering that, in fact, in the majority of all songbird species, females sing - and it is only now they are being properly heard.
Through this revelation and others, we can understand that animal songs are marvelous examples of the spectacular survival strategies that species have developed in order to stay alive.
America's Got Talent 15
Channel: eReality (Openview 108)
TX Time: 20h00
Genre: Reality Competition, Variety
The 15th season introduces new judge Sofia Vergara and welcomes back Heidi Klum, in addition to returning judges Simon Cowell and Howie Mandel.
Terry Crews returns as host.
In the season premiere, variety acts of all types and contestants of all ages audition for the chance to win the $1-million prize.
The Golden Buzzer is back, giving five acts the chance to go directly to the live shows to compete for America's vote.