NASA maps a week of Canadian wildfire smoke across North America
A new NASA model visualization traces brown-carbon smoke from July 14 through July 20 as unhealthy air spread through major U.S. and Canadian cities.
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A new NASA model visualization traces brown-carbon smoke from July 14 through July 20 as unhealthy air spread through major U.S. and Canadian cities.

Texas Christian University says Daniel Pullin resigned as chancellor effective immediately; former leader Victor Boschini Jr. is returning to the role.
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5 stories in this desk.Nigeria’s Senate has advanced a proposal to replace the law governing the National Universities Commission, the body that regulates university standards and accreditation.
The Justice Department has abandoned two appeals seeking to revive a rule that could have narrowed Public Service Loan Forgiveness eligibility for government and nonprofit workers. The move leaves two lower-court rulings blocking the rule intact, though it does not cancel loans or guarantee individual forgiveness.
The Texas Education Agency says districts using its state-developed curriculum posted stronger average year-over-year changes, while cautioning that the first release is descriptive.
A final Homeland Security rule replaces open-ended duration-of-status admissions with fixed terms and a new federal extension process beginning September 15.
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