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Although soup lattes, stunning latte art, and the continued reign of oat milk captured our attention at World of Coffee, it was the spirit of camaraderie that united the event.

Scientists investigated how various grind sizes can impact puck permeability (or how water moves through ground and tamped espresso) and extraction.

Researchers use math and physics to decode espresso extraction. Plus, Philz removes pride flags, and Starbucks union negotiations are still tense.

Philz Coffee, the San Francisco-based specialty chain, is removing Pride flags from all its stores.