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We summarize the week's scientific breakthroughs every Thursday.
- 			 Environment EnvironmentWildfires are making extreme air pollution even worse in the northwest U.S.America’s air is getting cleaner — except in places that are prone to wildfires. 
- 			 Ecosystems EcosystemsBird poop helps keep coral reefs healthy, but rats are messing that upEradicating invasive rats from islands may help boost numbers of seabirds, whose droppings provide nutrients to nearby coral reefs. 
- 			 Particle Physics Particle PhysicsReaders ask about proton pressure, wearable tech and moreReaders had questions about the pressure inside a proton, wearable tech safety and the effects of global warming on insects. 
- 			 Climate ClimateBloodflowers’ risk to monarchs could multiply as climate changesHigh atmospheric carbon dioxide levels can weaken the medicinal value of a milkweed that caterpillars eat, and high temperatures may make the plant toxic. By Susan Milius
- 			 Health & Medicine Health & MedicineAir pollution is triggering diabetes in 3.2 million people each yearA new study quantifies the link between smoggy air and diabetes. 
- 			 Animals AnimalsWhy humans, and Big Macs, depend on beesThor Hanson, the author of Buzz, explains the vital role bees play in our world. 
- 			 Earth EarthKilauea’s spectacular pyrotechnics show no signs of stoppingWatch some of the most striking videos and images of the strange, fiery beauty of the Hawaii volcano’s ongoing eruption. 
- 			 Earth EarthEarth’s rivers cover 44 percent more land than we thoughtA global survey of rivers and streams based on satellite data suggests that these waterways traverse about 773,000 square kilometers. 
- 			 Planetary Science Planetary ScienceMars got its crust quicklyThe Martian crust had solidified within 20 million years of the solar system’s formation. 
- 			 Genetics GeneticsReaders ponder geothermal power and moreReaders respond to stories from the May 26, 2018 issue of Science News. 
- 			 Climate ClimateWhy won’t this debate about an ancient cold snap die?Critics are still unconvinced that a comet caused a mysterious cold snap 12,800 years ago. 
- 			 Earth EarthThis volcano revealed its unique ‘voice’ after an eruptionIdentifying patterns in a volcano’s low-frequency sounds could help monitor its activity.