The air we breathe is 21 percent oxygen, an amount higher than on any other known world. While we may take our air for granted, Earth was not always an oxygenated planet. How did it come to be this way?

Donald Canfield covers this vast history, emphasizing its relationship to the evolution of life and the evolving chemistry of Earth.

He guides readers through the various lines of scientific evidence, considers some of the wrong turns and dead ends along the way, and highlights the scientists and researchers who have made key discoveries in the field.

LONDON: “Astro Bot,” one of Sony’s flagship titles for the PlayStation 5, raises the bar for 3D platform games.

Positioned as a competitor to well-known characters such as Mario and Sonic, this game delivers a delightful, imaginative experience, brimming with vibrant levels, innovative mechanics, and a healthy dose of nostalgia that will appeal to younger players and longtime PlayStation fans.

The storyline is simple but leaves plenty of room for the player’s imagination. You play as Astro, a charming robot hero on a mission to rescue his fellow bots scattered across various galaxies after an attack on their spaceship. While the narrative is not groundbreaking, it serves its purpose well, keeping the focus on the gameplay.

“Astro Bot” is designed to engage players of all ages. With a 7-plus age rating, it’s accessible to a wide audience — my 4-year-old, for example, finds it captivating. The game offers about nine hours of playtime for those focused on the main story, with closer to 17 hours for completionists seeking out bonus areas and treasure.

Visually, “Astro Bot” shines. Across six distinct galaxies and more than 80 creatively designed levels, players will explore tropical paradises, icy landscapes and futuristic environments, each packed with charm and variety. The level design ensures the game stays fresh throughout, keeping players engaged.

One of the game’s standout features is its exceptional use of the PS5’s Dual Sense controller. Haptic feedback and adaptive triggers make Astro’s movements feel more immersive than ever. New gadgets and abilities, like animal-themed power-ups, are seamlessly integrated into the gameplay, adding depth and variety. The way the game maximizes the controller’s features makes every jump, glide and gadget interaction feel responsive and exciting.

“Astro Bot” is also a treasure trove for PlayStation history enthusiasts. With more than 150 iconic characters to collect — like PaRappa the Rapper, Kratos from “God of War” and Nathan Drake from “Uncharted” — the game taps into nostalgia that will bring a smile to long-time fans.

Accompanied by a playful soundtrack composed by Kenny C.M. Young, which is available on platforms such as Spotify and Apple Music, the overall experience is joyful and engaging.

In short, “Astro Bot” is a must-play for PS5 owners. It provides fun for all ages and sets a new benchmark for platforming games.