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Lena V. Groeger

News Applications Developer

Photo of Lena V. Groeger

Lena V. Groeger is an investigative journalist and developer at ProPublica, where she makes interactive graphics and writes about design’s real-world consequences. She is on the board of the Society for News Design and has taught classes on design and data visualization at NYU, The New School and CUNY. Before joining ProPublica in 2011, Groeger covered health and science at Scientific American and Wired magazine. She is particularly excited about the intersection of cognitive science and design, as well as telling stories with real-world impact.

Some Thoughts on Timelines

Three different approaches to presenting stories over time.

What the Frack is in That Water?

Environmentalists have repeatedly pressed regulators to compel oil and gas companies to report what chemicals they use in the drilling and fracking process. No one knows the exact makeup of the frack mixture or drilling muds, but this list breaks down the main ingredients revealed so far.

What the Frack is in That Water?

Taking Stock of the Stock Act: A Side-by-Side Comparison

The Stop Trading on Congressional Knowledge Act, or Stock Act, recently passed in both chambers of Congress. We break down the main differences between the House and Senate versions, with a real-life scenarios that illustrate activities the bill targets.

New York Court Affirms Towns’ Powers to Ban Fracking

New York communities gain new authority to determine who can frack in their town.

Federal Rules to Disclose Fracking Chemicals Could Come with Exceptions

New proposed federal regulations would require drillers to disclose the names and concentrations of the chemicals they use, but would allow exemptions for substances deemed trade secrets.

Komen's Contortions: a Timeline of the Charity’s Shifting Story on Planned Parenthood

The Komen foundation's decision to cut funding to Planned Parenthood set off such an uproar that the charity quickly gave it back. We trace how their explanations changed along the way.

From Gung-Ho to Uh-Oh: Charting the Government’s Moves on Fracking

Fracking has only recently become a household word, but government involvement with the drilling technique goes back decades. We trace officials' moves -- and levels of caution -- over time.

$10 Million Fine on Red Cross Highlights Its Troubled History of Blood Services

The nation’s largest supplier of blood has been hit with yet another big fine for longstanding problems with its blood services.

Inside Romney’s Tax Returns: A Reading Guide

Mitt Romney released 550 pages of tax returns Tuesday. News organizations are making their way through them. Here’s our guide to where to look to make sense of the numbers.

Little Progress in Congress on Push for Forensic Standards

Efforts to reform forensic science have struggled with the issue of how independent a new national agency would be.

Giffords May Get Better Brain-Injury Care Than Most of Her Constituents

Because of a lack of research and spotty insurance coverage, thousands of Americans with brain injuries don’t receive the comprehensive treatment they need.

New Bill Would Put Taxpayer-Funded Science Behind Pay Walls

Want to read the results of the biomedical research you helped pay for? You can find it for free. Now, two House members have introduced a bill — with the backing of big medical publishers — that would force taxpayers to pay for access.

Underwater Homeowners May Swim Freely

Pundits argue that when homeowners owe more on their house than it's worth, they find it hard to move to find jobs. One economist challenges the very foundation of their claim.

New Technologies in the Works to Detect Brain Injuries

Handheld devices and blood tests that could give medical personnel quick, reliable ways to test for concussions in the field are advancing, but remain a few years away.

Speeding Up Security: The TSA Wants to Screen Before They Scan

PreCheck, a TSA initiative, offers travelers expedited security screening if they allow the agency to track their flying habits and to collect other personal information.

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