Black swallowtails

Many roles of color patterns in black swallowtail butterflies

Aug. 4, 2020

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

New priorities in Boulder, Colo. Kevin Krizek, CC BY-ND

With fewer cars on US streets, now is the time to reinvent roadways and how we use them

July 27, 2020

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...

People wearing masks and social distancing at the Sanctuary of Our Lady of Lourdes on May 30, 2020. Laurent Dart/AFP via Getty Images

Online Christian pilgrimage: How a virtual tour to Lourdes follows a tradition of innovation

July 27, 2020

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...

Larval ladybug

A ladybug's bright colors advertise toxic chemical defenses

July 21, 2020

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...

Buffalo in the sunset

Planning for contact tracing and testing

July 14, 2020

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...


Duckweed is an incredible, radiation-fighting astronaut food – and by changing how it is grown, we made it better

July 14, 2020

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...

Firemoth blanketflower

Natural selection influences both wildflower and viral mutations

July 8, 2020

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...

Heat wave map

100 degrees in Siberia? 5 ways the extreme Arctic heat wave follows a disturbing pattern

June 26, 2020

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 caterpillars in an ancient mutualism with ants

Reakirt's blue caterpillars in an ancient mutualism with ants

June 9, 2020

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...


Emulate the buffalo and Be Well

June 8, 2020

We launch this campaign to help our college family be well and stay well “How are you?” Normally, that rote inquiry precedes a ready response: “I’m well.” Today, however, we grapple with the global pandemic, record unemployment, political polarization and historic levels of protest of our citizens’ long history of...