Skip to main content

What’s your string theory for Mars rover’s latest find?

NASA’s Perseverance rover is on a quest to find life on Mars, or at least, evidence of it once existing there.

As it continued to explore the martian surface last week, the roving laboratory stumbled upon what appeared to be a bundle of string. The bizarre discovery was captured by one of Perseverance’s plethora of cameras and beamed back to Earth for scientists to study. The photo so intrigued the public that it topped NASA’s poll for the mission’s Image of the Week.

Recommended Videos

While it’d be wonderful to be able to conclude that it was left by an alien with a penchant for pasta, the truth appears to be rather more prosaic.

A string-like object discovered by NASA's Mars rover.
A string-like object discovered by NASA’s Mars rover in July 2022. NASA/JPL-Caltech

According to officials at NASA’s Jet Propulsion Laboratory, which is overseeing the current Perseverance Mars mission, the string-like material was probably part of the descent stage or a piece of cord from the parachute that delivered the rover to the martian surface in spectacular fashion last year.

So, nothing to do with extraterrestrials.

But then another odd thing happened. A photo of the same location taken four days later showed that the string had vanished. However, this too can be explained pretty easily, as the winds that whip across Mars seem likely to have blown the object to another location.

This isn’t the first unusual find that Perseverance has made while exploring the martian surface. Last month, for example, the rover came across what’s likely to have been a piece of a thermal blanket that, like the string, came down with Perseverance’s descent stage.

Although it’s exciting to think that Perseverance might one day happen upon some truly bizarre object that’s been on Mars for billions of years, it’s highly unlikely to happen. That’s because the landscape, while fascinating in and of itself, contains only rocks, dust, and sand. And, hopefully, evidence of ancient microbial life …

Trevor Mogg
Contributing Editor
Not so many moons ago, Trevor moved from one tea-loving island nation that drives on the left (Britain) to another (Japan)…
NASA lost contact with Mars Ingenuity helicopter for a week — but it’s OK now
NASA's Ingenuity helicopter.

NASA has announced that it recently lost contact with the Ingenuity helicopter on Mars for a week. Communications with the helicopter have now been restored, and it will continue exploring Mars's Jezero crater along with the Perseverance rover.

The Ingenuity helicopter has outlasted all expectations, originally designed to make just five flights but completing an incredible 51st flight in April. However, this extended lifespan means that the helicopter has run into problems, particularly when the Martian winter set in and it was difficult for its solar panels to generate enough heat to keep its electronics warm. This means that the helicopter must deal with occasional brownouts of power during the nighttime, which can affect the time at which the helicopter wakes up each morning.

Read more
NASA’s June skywatching tips include Mars in the Beehive
how to photograph perseid meteor shower night sky with

What's Up: June 2023 Skywatching Tips from NASA

NASA is back again with its monthly roundup of what to look out for in the sky over the coming weeks.

Read more
See a 3D view of a martian crater captured by the Perseverance rover
A snippet of the mosaic of Belva Crater taken by the Perseverance rover.

The Jezero crater on Mars, where NASA's Perseverance is currently exploring, is vast at nearly 30 miles across and was likely created by a huge asteroid impact. But there wasn't just one asteroid impact -- it's thought that several asteroids hit the area over millions of years, creating a succession of craters that overlap and fit within each other.

A snippet of the mosaic of Belva Crater taken by the Perseverance rover. NASA/JPL-Caltech/ASU/MSSS

Read more