NASA has released a video explaining why it thinks ancient Mars was similar to Earth.
The US space agency’s Dr. Becky McCauley Rench explains why she thinks Mars was once much “wetter and warmer”.
Nasa thinks Mars was once watery like Earth, as depicted in this mockup image[/caption]
We now know Mars as a dry and arid planet[/caption]
The Nasa scientist starts the video by stating: “Whenever the Solar System first formed over four billion years ago, Mars and Earth formed out of the same stuff and so they looked very similar.
“While today, whenever we look at Mars we see a very dry planet as compared to the Earth, which is you know our blue marble, we see evidence of past lakes and streams.
“It may have even had a shallow northern ocean.
“However, they diverged and we have two very different planets today.”
The Nasa videos contains mockup images of what water could have looked like on Mars and compares the idea to the dry planet we know today.
Most read in News
The similarities between the two planets are important to scientists because they could help them look for signs of ancient life on Mars.
Dr McCauley Rench continued: “As the Earth progressed with plate tectonics and the development of life.
“Mars’ geological activity subsided, lost that water and it became a much drier planet.
“That’s part of why it’s so fascinating to study Mars and that helps us understand more about Mars’ past and future, as well as understanding Earth and planetary evolution, both in our Solar System and beyond.”
So, Nasa concludes that Mars did once look like Earth but that was likely to have been billions of years ago.
Some water still exists on the surface of Mars but today in ice form.
There’s also thought to me more water underneath the surface and scientists continue to investigate this.
- Get all the latest Science news
- Keep up-to-date with the top Space & Astronomy stories
- All the latest Archaelogy news from dinosaurs to Ancient artefacts
Find out more about science
Want to know more about the weird and wonderful world of science? From the Moon to the human body, we have you covered…
- When is the next Full Moon?
- What is a Super Moon?
- What is SpaceX?
- Where is the edge of space?
- How many bones are in the human body?
- How many chromosomes do humans have?
- What causes a volcano to erupt?
- Which sharks attack the most humans?
- What are the conspiracy theories about the world ending?
- All the UFO sightings and whether aliens are real
- Which country has the most earthquakes?
In other news, Nasa is gearing up to launch a spacecraft that will crash into as asteroid as part of a trial of a new planetary defence system.
Find out about the wildly impressive Panasonic 65HZ1000 TV, which makes most tellies look rubbish.
Read our complete guide to Call of Duty Vanguard.
And Dell’s Alienware R10 Ryzen Edition is a gaming PC powerhouse that crushes both the new consoles.
We pay for your stories! Do you have a story for The Sun Online Tech & Science team? Email us at [email protected]