Tackling the Big Questions Written 7 January 2025

‘We must continue to do the really hard things,’ said JPL’s Director in the 2025 AIAA SciTech Forum’s opening plenary session

By Anne Wainscott-Sargent, AIAA Communications Team

ORLANDO, Fla.– The 10th and only female director of NASA Jet Propulsion Laboratory (JPL) opened the 2025 AIAA SciTech Forum Monday, highlighting the hard questions that JPL answers in its unique role as a federally funded R&D center operated by CalTech for NASA.

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Laurie Leshin, who has been at the helm of JPL since 2022, shared how JPL’s work focuses on answering three fundamental questions: “What is our destiny on Earth?”, “Are we alone?”, and “How do we lead the future?”

She implored the audience to continue striving for knowledge. “If I have one message for you in this time of change in our country, it is we must continue to do the really hard things,” she said. “Our job as a nation in order to lead is not to do what’s easy…or what you can predict exactly how it’s going to go…Our job is to do the things that are ridiculously hard.”

Understanding Earth

Leshin pointed out that while JPL is most known for its work in space exploration, it also brings decades of history contributing to understanding Earth using cutting-edge space-based radars capable of measuring pollution, ocean rise, and urban heat, among other items critical to understanding climate change and predicting natural disasters. One important focus is identifying super emitters of methane, an odorless gas invisible to the naked eye that is responsible for 30–40% of global warming (due to its structure, methane traps more heat in the atmosphere per molecule than carbon dioxide, making it 80 times more harmful than CO2 for 20 years after its release). Runaway methane leaks in pipelines cost oil and gas companies $1 billion a year, she noted. Methane is now visible from orbit thanks to the EMIT tool attached to the International Space Station.

JPL also is finding and mapping heat islands in big cities such as Los Angeles and Houston, where concrete jungles are adding to the heat issue. Insights from the Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station, or ECOSTRESS mission, is helping cities find hot spots. It has led one neighborhood in Los Angeles to use a reflective coating on streets to lower one street’s temperatures by up to 4 degrees Fahrenheit, leading to a noticeably cooler environment for residents.

Leshin said JPL researchers are working with global partners to map Earth’s water to better understand how rivers and lakes respond to flooding. In a first-ever collaboration with the Indian Space Research Organisation (ISRO), JPL will launch the NISAR Earth-observation radar this spring that will help view changes to the Earth’s surface so people can prepare for volcanoes, earthquakes, and landslides. According to Leshin, it will provide “unprecedented eyes on Earth.”

Finding Proof of Life Beyond Earth

In exploring the question of “Are we alone?” Leshin observed, “In some ways I like to say we are in a space race with ourselves in trying to answer this question.”

There’s a race to find evidence of life beyond Earth, and the big questions is where will the evidence come from — Mars, the moons of Jupiter or Saturn, or an exoplanet?

JPL is tackling this quest across all those avenues and has made significant inroads over the last few decades studying the surface of Mars. Missions have gone from larger ground-based rovers to a new way of exploring the Red Planet from the air.

“Today we are there with Perseverance,” said Leshin, noting that the rover recently collected “incredible samples” from a rock that points to ancient life on Mars. The rover’s instruments detected organic compounds within the rock, which are essential to all known life. These rocks and other samples are housed in tubes inside Perseverance, but how and when they will find their way back to Earth for study is a big question. “Landing on Mars is really stupid hard,” she added.

Rethinking Mars’ Sample Return

JPL has spent significant time rethinking how it does Mars sample return. NASA is discussing the path forward with media on Tuesday, 7 January. A 2023 assessment indicated that returning Mars samples would take until 2040 at a price tag of $11 billion. JPL’s concept would cut the cost in half and the timeline to a decade. Leshin said the approach will include heavy industry collaboration to get these rocks back. NASA’s proposal will use the stacking technology that has successfully landed the last two rovers on Mars to get a big lander with a rocket on board down to the surface of Mars, load it with the sample tubes and returning it to Earth safely. She also indicated that she’s very open to leveraging SpaceX’s Starship vehicle to get the lander to the Red Planet, which wouldn’t occur for another decade at the earliest, she stated, adding that partners such as the European Space Agency will play a key role in getting the samples home.

Another exciting avenue for investigating evidence of life beyond Earth is through ocean worlds. Two months ago, JPL launched the Europa Clipper probe to Europa, a moon of Jupiter. “It’s doing great. It’s flying beautifully,” said Leshin, noting that it will fly by Mars on 1 March, and will come back to Earth before it heads to Jupiter, where it is expected to arrive in 2030.

“We think there are two Earth oceans worth of liquid water on Europa,” she added, explaining that the ingredients for life will likely be present beneath those oceans.

“One of the challenges with deep space exploration is you have to be patient,” said Leshin, who described the Europa effort as “a generational quest.” She noted the wait is worth it because “the science will be incredible.”

JPL also sees promise in exoplanets – deploying transit spectroscopy as one of the lab’s tools to discover distant planets that are so far away that they can only be detected through the brightness of an individual star. To date, NASA has found over 5,500 exoplanets.

The Nancy Grace Roman Space Telescope, scheduled to launch in October 2026, will provide an even wider of view of these planets and other galaxies.

JPL also is investing in autonomous capabilities and the next generation of robotics. One such innovation is EELS (Exobiology Extant Life Surveyor), a 14-foot snake-like robot. JPL is already testing a prototype, which is winding down frozen crevasses on Earth. “It’s got to be smart enough to make its own decisions,” she noted, adding that the JPL team had to innovate around the form factor as well as the avionics and how it works and “thinks.”

Leading the Future

In closing, Leshin said the work of JPL is focused on driving humanity forward through the forefront of technology. “We’re incredibly proud of the work we do. And we can answer the biggest, hardest questions if we dare mighty things together.”

Reaction to Leshin’s lecture was well received by attendees.

“It was a nice flyover of the work they do at JPL,” said Egbert Hood, an aerospace engineer at Lockheed Martin Aeronautics in Fort Worth, Texas. “It was interesting to hear of all the missions they have ongoing – and some for them had nothing to do with landing on a moon or planet, it was just exploration of space. It was good to get a new awareness of JPL.”

Amanda Simpson, CEO, Third Segment, expressed excitement for Leshin’s message. “We have to do the hard things! It brought to mind President Kennedy’s moon speech. Space is hard. If we only concentrate on doing the easy things then we’re not actually making any progress. The way we treat going off our planet tells us so much about ourselves. And to do that, we must do the things that are hard. To do that together and to challenge ourselves – those are the keys that are going to make the difference for the future. Inspiring the future is so critical for keeping this industry, this ecosystem in aerospace, moving forward to entice and inspire the future generations.”

CJ Negrete, an undergraduate student at Cal Poly Pomona in Los Angeles, previously interned at JPL, where she worked to increase the technology readiness level of oscillating heat pipe (OHP) technology, commonly used in high-heat density electronics and exoplanet detection. She credited Leshin’s presence as a plenary speaker as one reason she decided to attend the forum, saying that having a woman at the helm of JPL “is brand new and unheard of.”

“Dr. Leshin is leading the pack of what women are more than capable of doing in the industry and we have to come and support her,” she said.

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