Canadian and Michigan officials insist the bridge will open as scheduled, even as the Trump administration raises new concerns about material, ownership and toll revenues. Follow for live updates.

From table salt to snowflakes, and from gemstones to diamonds—we encounter crystals everywhere in daily life, usually cubic ...

When a cell divides, it performs a feat of microscopic choreography—duplicating its DNA and depositing it into two new cells. The spindle is the machinery behind that process: It latches onto ...