Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.

In 1997, Lowe's Motor Speedway improved its catch fence by adding height and cable along walls down the front straightaway, which is often the stands' most crowded section. After last year's accident at Michigan, Lowe's increased the height of its fence and the overhang, bringing the total height to 17 feet. The spectators involved Saturday were sitting just past the exit of the fourth turn, not on the straightaway.

Therwyth al roſy hewed tho woxe ſhe / And gan to hym, and ſayd, ſo I trowe / Aquyte him wel for goddes loue (q[uo]d he) / My ſelfe to medes wol the lettre ſowe […]

They might as well walk as drive in this traffic.