David Attenborough celebrates his 100th birthday with global tributes marking seven decades of legendary natural history broadcasting.The BBC held a celebratory event at the Royal Albert Hall while fans gathered in Trafalgar Square to honor his conservation impact.Attenborough revolutionized television with iconic documentaries including Life on Earth and The Blue Planet since his debut in 1952.Scientists recently named a parasitic wasp species in his honor while he continues his lifelong advocacy for environmental preservation.