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You arrive while the sky is turning blue-grey, hear the first burst of music from the midway and realise the Canadian National Exhibition has opened for another season. The event began in 1879 as the Toronto Industrial Exhibition, designed to bring together farming, industry and new ideas from across Canada. More than a century later, that purpose still survives in the exhibits and demonstrations spread across the grounds.

A first-time visitor might start with the giant slide, then drift towards the soaring swings, game booths and live performances. The food is part of the tradition too, with poutine, corn dogs, butter tarts and ice cream drawing long queues alongside the CNE's famous over-the-top creations. Look up and you may also catch the Canadian International Air Show, scheduled for September 5-7 over Toronto's waterfront. By evening, thousands of lights flicker on, rides glow against the darkening sky and the whole place hums with late-summer excitement. So, what's your first stop at the CNE this year?

An orca breaks the surface of Lynn Canal against the backdrop of the snow-capped Chilkat Mountains in Southeast Alaska, United States. Also known as the killer whale, the orca is the largest member of the dolphin family and one of the ocean's most recognisable predators. Alaska's Inside Passage provides abundant feeding grounds, sustaining salmon runs and a rich variety of marine life that supports these remarkable animals.

Scientists recognise several distinct orca populations, each with its own diet, hunting strategies and social traditions. Some specialise in catching fish, while others prey on seals, sea lions and other marine mammals. Living in tightly bonded family groups led by experienced older females, orcas communicate through distinctive calls unique to each pod—vocal traditions passed down through generations. Lynn Canal and its surrounding waterways form an important part of this coastal habitat and offer a setting for observing these marine mammals in the wild.

Where two great deserts meet, Joshua Tree National Park reveals a stark, mesmerising landscape shaped by wind, time and extremes. In Southern California, the higher Mojave Desert merges with the hotter, lower Colorado Desert, creating a unique blend of ecosystems and remarkable biodiversity.

Across nearly 3,220 square kilometres, spiky Joshua trees—actually a species of yucca—rise from sandy plains, their twisting silhouettes punctuating fields of weathered granite boulders. Massive rock formations, cracked and sculpted over millions of years, attract climbers and hikers seeking routes through this rugged terrain.

Life persists here in remarkable ways. Desert bighorn sheep, reptiles and hundreds of bird species thrive in an environment defined by scarce water and intense sun. Spring may bring bursts of wildflowers, while crystal-clear nights reveal some of the darkest skies in the country—ideal for stargazing. Designated as a national monument in 1936, the vast landscape became a national park in 1994. It invites exploration, offering an unforgettable encounter with the raw beauty and resilience of the American desert.

The best route here isn't built with concrete. Instead, the tide reveals a rocky path leading from Whytecliff Park to Whyte Islet in West Vancouver, Canada. A few hours later, the sea quietly covers the crossing again, making timing part of the experience. This shoreline has drawn visitors for generations. The tide opens the path; wet rocks keep you humble. The reward is a sweeping view back towards the beach and the hillside homes of Gleneagles.

Named after the pale cliffs that once marked this stretch of coast, Whytecliff Park also made history when the surrounding waters became Canada's first saltwater marine protected area in 1993. Today, those waters support more than 200 marine animal species, making the park a favourite for scuba divers and wildlife watchers. Harbour seals are often seen close to shore, and orcas have even passed through the area. Beyond the park, visitors can also explore Lighthouse Park or hike to the waterfalls at Cypress Falls Park before calling it a day.

National Aviation Day, observed on August 19, celebrates the history of flight and the people who helped shape it. The day honors Orville Wright, whose pioneering work with his brother Wilbur helped launch the age of powered aviation.

Established by President Franklin D. Roosevelt in 1939, the observance recognizes aviation's impact on transportation, science, defense, and exploration. From the first powered flights to modern aircraft and spacecraft, aviation continues to connect people, expand knowledge, and inspire innovation.

Today's image captures aviation research in action. In 1938, engineers at what is now NASA's Langley Research Center mounted the Navy's Brewster XF2A-1 Buffalo fighter prototype in the Full-Scale Tunnel in Hampton, Virginia. There, researchers studied airflow around the aircraft and tested ways to reduce drag, the force that slows objects moving through the air. Experiments like these helped improve aircraft performance and advance the science of aerodynamics long before the space age began.

Roads have made travel faster for people but created new challenges for wildlife. Highways often cut across their regular migration routes, increasing collisions, fragmenting habitats and isolating animal populations. Wildlife crossings, also known as ecoducts, were developed to reconnect these landscapes. They include vegetated bridges over roads and tunnels beneath them, allowing animals to cross safely while reducing the risk of vehicle collisions. Some of the earliest modern examples appeared in France during the 1950s, while the Netherlands later expanded the idea with wide, green bridges designed to blend into the surrounding landscape.

Today, wildlife crossings can be found around the world and are used by species ranging from frogs and turtles to elephants and bears. Many are carefully monitored with motion-sensing cameras, which have recorded thousands of successful crossings by a variety of animals. By restoring safe movement between habitats, these structures help maintain healthy ecosystems and remind us that thoughtful engineering can benefit both people and wildlife.