David Attenborough’s latest series, Mammals, continued on Sunday – and one scene proved very emotional for those tuned in. The legendary biologist and natural historian continued his series exploring the remarkable adaptability of different mammals. The fourth episode in the series, titled Cold, explored the unique physical traits and behaviours of mammals living in some of the coldest parts of the world. In one heartbreaking part of the episode, Attenborough narrated as newborn seals were left separated from their mothers for the first time. While most are reunited, some of the mothers are ne…