'He's in our hearts': Family and friends still seek answers one year after Nathan Wise’s disappearance
It’s been a year since Nathan Wise went missing and his family is no closer to finding out what happened to him.
A quake-measuring device on Mars is providing the first detailed look at the red planet's interior, revealing a surprisingly thin crust and a hot molten core beneath the frigid surface.
In a series of articles published this week, scientists reported that the Martian crust is within the thickness range of Earth's. The Martian mantle between the crust and core is roughly half as thick as Earth's. And the Martian core is on the high side of what scientists anticipated, although smaller than the core of our own nearly twice-as-big planet.
These new studies confirm that the Martian core is molten. But more research is needed to know whether Mars has a solid inner core like Earth's, surrounded by a molten outer core, according to the international research teams.
Stronger marsquakes could help identify any multiple core layers, scientists said Friday.
The findings are based on about 35 marsquakes registered by a French seismometer on NASA's InSight stationary lander, which arrived at Mars in 2018. The domed seismometer has actually detected 733 marsquakes so far, but the 35 with magnitudes from 3.0 to 4.0 served as the basis for these studies. Most of the sizable quakes originated in a volcanic region 1,000 miles (1,600 kilometres) away where lava may have flowed just millions of years ago.
Mark Panning of NASA's Jet Propulsion Laboratory, who took part in the crust study, said even the biggest marsquakes are so weak they would barely be felt on Earth. He's hoping for “the big one” which would make it easier to process the data and define the Martian interior.
“Fingers crossed, we would love to see some bigger events,” Panning said.
Current measurements show Mars' crust possibly reaching as deep as 12 miles to 23 miles (20 kilometers to 37 kilometres); the mantle extending down nearly 1,000 miles (1,600 kilometres); and the relatively lightweight core with a radius of 1,137 miles (1,830 kilometres).
By comparison, Earth's crust ranges from a few miles (kilometres) beneath the oceans to more than 45 miles (70 kilometres) beneath the Himalayas. Earth is almost double the size of Mars.
“By going from cartoon understanding of what the inside of Mars looks like, putting real numbers on it ... we are able to really expand the family tree of understanding” how our solar system's rocky planet formed, Panning said.
Its mission extended by another two years, InSight has been hit with a power crunch in recent months. Dust covered its solar panels, just as Mars was approaching the farthest point in its orbit around the sun.
Flight controllers have boosted power by using the lander's robot arm to release sand into the blowing wind to knock off some of the dust on the panels. The seismometer has continued working, but all other science instruments remain on hiatus because of the power situation - except for a German heat probe was declared dead in January after it failed to burrow more than a couple feet (half a meter) into the planet.
The three studies and a companion article appeared in Thursday's edition of the journal Science.
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It’s been a year since Nathan Wise went missing and his family is no closer to finding out what happened to him.
Dozens of Ontarians are expressing frustration in the province’s health-care system after their family doctors either dropped them as patients or threatened to after they sought urgent care elsewhere.
An Ottawa pizzeria is being recognized as one of the top 20 deep-dish pizzas in the world.
Amazon's paid subscription service provides free delivery for online shopping across Canada except for remote locations, the company said in an email. While customers in Iqaluit qualify for the offer, all other communities in Nunavut are excluded.
The fire burning near Fort McMurray grew from 25 hectares to 5,500 hectares over the weekend.
Russia’s President Vladimir Putin began a Cabinet shakeup on Sunday, proposing the replacement of Sergei Shoigu as defence minister as he begins his fifth term in office.
Police are searching for a male suspect after a man was “slashed in neck” on Sunday morning in downtown Toronto and died.
There were some scary moments for several people on a northern Ontario highway caught on video Thursday after a chain reaction following a truck fire.
Health Canada announced various product recalls this week, including electric adapters, armchairs, cannabis edibles and vehicle components.
English, history, entertainment, math and geography: high school trivia teams could be quizzed on any of it when they compete at the Reach for the Top Nationals in Ottawa in June.
An Ottawa pizzeria is being recognized as one of the top 20 deep-dish pizzas in the world.
A family of fifth generation farmers from Ituna, Sask. are trying to find answers after discovering several strange objects lying on their land.
A Listowel, Ont. man, drafted by the Hamilton Tigercats last week, is also getting looks from the NFL, despite only playing 27 games of football in his life.
The threat of zebra mussels has prompted the federal government to temporarily ban watercraft from a Manitoba lake popular with tourists.
A small Ajax dessert shop that recently received a glowing review from celebrity food critic Keith Lee is being forced to move after a zoning complaint was made following the social media influencer’s visit last month.
The Canada Science and Technology Museum is inviting visitors to explore their poop. A new exhibition opens at the Ottawa museum on Friday called, 'Oh Crap! Rethinking human waste.'
The Regina Police Service says it is the first in Saskatchewan and possibly Canada to implement new technology in its detention facility that will offer real-time monitoring of detainees’ vital health metrics.
Just as she had feared, a restaurant owner from eastern Quebec who visited Montreal had her SUV stolen, but says it was all thanks to the kindness of strangers on the internet — not the police — that she got it back.