Â鶹ÊÓƵ

Wielding all of these defenses, these moths have little to fear from birds or bats and they ignore photographers with impunity Triangular leaf senecio, Senecio triangularis , is common on the eastern slope of Cimarron Ridge in the San Juan Mountains, from 9,000 to over 10,000 feet. This year they...

The colors and patterns of black swallowtails reveal the diversity of evolutionary dynamics acting on the sexes and the various life-history stages

Emerging forms of mobility and changing mindsets can help deliver these opportunities Sticking closer to home because of COVID-19 has shown many people what cities can be like with less traffic, noise, congestion and pollution. Roads and parking lots devoted to cars take up a lot of land . For...

The coronavirus pandemic has caused unprecedented disruptions to many religious activities The Catholic Church held what is being termed as the first online pilgrimage to the Sanctuary of Our Lady of Lourdes in France. Earlier this spring, for the first time in its 162-year existence the shrine was closed as...

Evolutionary biologists have noted that effective chemical defenses promote gregarious behavior During fall in the mountains, ladybugs migrate uphill, forming dense overwintering populations, defended by the alkaloids of thousands of insects." Virtually everyone can identify ladybugs and most are pleased to see the brightly colored beetles, while gardeners treasure them...

I have vowed to continue to inform you of what we know as quickly and completely as I can, so I write to share some steps we are taking on COVID-19 testing and contact tracing on campus this fall. Testing and contact tracing are mentioned in the CU Boulder Road...

What’s the big idea? Current industrialized food systems were optimized for a single goal – growing the maximum amount of food for the least amount of money. But when room and supplies are limited – like during space travel – you need to optimize for a different set of goals...

Mutations produce new genetic forms all the time, in all species, in all genes At this time of year, firemoths ( Schinia masoni ) can be seen on blanketflower ( Gaillardia aristata ), a colorful native wildflower. Evolution is the change of genetic forms in a population. We are watching...

What is happening in the Arctic is very real and should serve as a warning to everyone who cares about the future of the planet as we know it The Arctic heat wave that sent Siberian temperatures soaring to around 100 degrees Fahrenheit on the first day of summer put...

Reakirt's blue, Echinargus isola, is one of ten species of blue butterflies in the Front Range Reakirt's blue butterflies were moving among the flower heads of white clover in my lawn. I presumed that they were nectaring, but I watched closely and discovered that they were ovipositing. They would fly...