Meghan Markle and Prince Harry posted a tribute on Australia Day, and shared "stories of how you’ve come together in the face of such adversity."Kate Middleton and Prince William similarly celebrated the "incredible strength and resilience of all the Australian people."Australia has been facing devastating and deadly wildfires, which have killed an estimated 1.25 billion animals, and at least 29 people.Australia Day takes place on January 26, and members of the royal family have been paying