That dogs are more humane than human beings is a fact well known. Time and again, dogs have proven themselves to be angels in disguise. Not that it was needed, here's another instance that will prove beyond doubt that there exists no other species as great as theirs.

Source: Slideshare

In Uzhgorod, Ukraine, a female canine called Lucy, got injured and was stranded on railway tracks. When another dog nearby, named Panda, learned about this, he immediately went to his friend's rescue. 

Source: BlogOfSanta

In the blistering cold, he helped her keep warm by laying next to her. And every time a train would pass by, he would help her push down her head towards the ground to let the train pass without being harmed. He kept doing this for two whole days before a group of animal rescuers found out about this and took both the animals to safety and returned them to their owners. 

Source: Boredpanda

Denis Malafeyev, wrote about the incident on Facebook, saying,

The male dog was doing this for two days in a row. Think about it. He was keeping her warm. When we arrived, it turned out that one of the dogs, the female, was injured and couldn’t move. The male dog heard the sound of the approaching train, came close to the female dog and laid down next to her. Both of them pushed their heads towards the ground, and let the train pass.
Source: Livejournal

Here, watch a video showing how the two dogs let a train pass right over them while managing to duck under it safely.