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WashU is proud to sponsor the St. Louis Earth Day Festival! The St. Louis Earth Day Festival is a community tradition to learn about sustainable products and services offered by local businesses and organizations, meet local area non-profits that share Earth Day values, as well as showcasing local entertainment and local Green Dining Alliance restaurants.

The Office of Sustainability will be offering free park and ride shuttles for anyone attending the festival. Volunteer opportunities with Earth Day are also available.

Event site: https://earthday-365.org/festival/visitors/#1517342726202-bc1a1580-6a29

Join us for a special Preservation Week book club with guest host Danielle Creech, Head of Preservation, Processing, and Exhibitions. We will discuss The Monuments Men by Robert M. Edsel.

In The Monuments Men, we follow a special force of American and British museum directors, curators, art historians, and others, who risked their lives scouring Nazi-occupied Europe to prevent the destruction of thousands of years of culture. Focusing on the eleven-month period between D-Day and V-E Day, this fascinating account follows six Monuments Men and their impossible mission to save the world’s great art from the Nazis.

Book club will begin with a presentation on the importance of provenance and the struggle to protect its physical indicators during the conservation process.

Free and open to all, registration required for Zoom link.

https://wustl.libcal.com/event/16655291

Join us for the April 2026 Commute Challenge! This campus-wide challenge celebrates, supports and encourages the use of sustainable transportation at WashU. It takes place on Thursday, April 23rd and is part of April’s Active Transportation Month. This is the same day as the WashU Earth Day Festival on the Medical Campus, so try taking a sustainable mode over to the festival! Eligible forms of commute include: biking, walking, taking public transit or shuttles, carpooling, and vanpooling (Medical Campus only).

Winners will be randomly selected based on trips logged in WashU Rides on the date of the challenge.

Prizes
Four $25 raffles for participants who log at least one trip during the challenge
All participants who log a trip may request a free Bicycle Benefits sticker
There will be two winners from the Danforth, North and West Campus network and two from the Medical and Cortex Campus network

How to participate
Go to WashU Rides, sign in using your WashU Key, and you will be automatically enrolled. Log at least one trip on April 23rd to be eligible for the challenge.

Galaxies, including the one we call home, are within halos of dark matter. But what exactly dark matter is remains something of a mystery. A research team from Washington University is part of a NASA-led mission taking a step towards answering that question. The Nancy Grace Roman Space Telescope—or Roman—aims to gather a wide array of data to demystify dark matter. Physics professor Tansu Daylan’s research collective of a dozen post-doc, graduate students, and undergraduates is a central part of Roman.

Over the last two decades, there have been a number of attempts to understand dark matter, but Roman has a unique capability to detect gravitational lensing, which Bryce Wedig, a fourth-year PhD candidate in physics working on the WashU team, explains is what happens when two galaxies line up. “What you get is light being bent by the closer galaxy,” Wedig says. “Based on how the light is being bent, it turns out we can learn about the dark matter in that galaxy.” According to Wedig, researchers have identified about 1,000 gravitational lenses, but there are as many as 160,000 that could help demystify dark matter. With its much wider field of view, Roman will help survey wide swaths of gravitational lenses and then narrow down to 500 to focus on. —Sonal Churiwal

The following flexibilities outlined in NOT-OD-25-059 are hereby rescinded.

2 CFR 200.1 – Modified Total Direct Cost Definition - Calculating Indirect Costs

2 CFR 200.414(f) - De Minimis Indirect Rate