On the Howstuffworks website, for example, you can read that wolves follow "an incredibly sophisticated group hierarchy ... The pack structure is said to include a "beta wolf" who is the deputy ...

The moon will pass directly in front of Mars, combining with the bright star Pollux to create a stunning view. Mars is one of ...

In every pack there’s a male and female wolf that rank higher than the others ... Previously, it was thought that the alpha pair ascended the pack hierarchy through dominance and aggression ...