Dr. Melanie Murchison

7.5K posts

Dr. Melanie Murchison

Dr. Melanie Murchison

@DrMMurchison

Law Scholar Instructor II Department of Sociology and Criminology, University of Manitoba @Qubschooloflaw PhD '16 Retweets do not constitute endorsements.

Winnipeg, Manitoba Se unió Mart 2009
1.6K Siguiendo482 Seguidores
Bryan Hayes
Bryan Hayes@HayesTSN·
Jeff Hoffman is an absolute rollercoaster experience every night
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Anish Moonka
Anish Moonka@anishmoonka·
You can smell rain better than a shark can smell blood. 200,000 times better. Your nose picks up the compound behind petrichor (that smell after rain) at levels so tiny it's like finding one teaspoon spilled across 200 Olympic swimming pools. That compound is called geosmin. It comes from soil bacteria. And the word "petrichor" itself didn't exist until 1964, when two Australian scientists, Isabel Joy Bear and Richard Thomas, published a paper in Nature trying to figure out why rocks smell after rain. They took the Greek words for stone and "the blood of the gods" and stuck them together. Blood of the stone. When soil stays dry for weeks, certain plants leak an oil that the clay soaks up like a sponge. At the same time, soil bacteria called Streptomyces start making spores (tiny survival pods that can sprout into new bacteria later) and give off geosmin while they do it. The smell just sits there in the dirt, waiting. Then rain hits. A 2015 MIT paper figured out the physics of what happens next. Raindrops land on dry soil and trap tiny air bubbles in the soil's pores. The bubbles rise up through the raindrop and pop out the top, flinging thousands of tiny droplets into the air. Each one carries a piece of the oil, some bacterial spores, and some geosmin. Wind does the rest. Light rain releases the most of these droplets. Heavy rain releases very few, which is why a drizzle smells more than a downpour. MIT estimated that rain across the planet throws between 10,000 and 800,000 trillion bacterial cells into the air every single year. In 2020, scientists in Sweden and the UK published a paper in Nature Microbiology that explained why this smell exists at all. Streptomyces bacteria only release geosmin when they're about to die and make spores. The smell is a bacterial ad. It attracts tiny 1.5mm bugs called springtails, which eat the bacteria. Springtails have evolved enzymes that let them survive the antibiotics Streptomyces produce to kill everything else. In exchange, the bacterial spores pass through the springtail's gut alive and stick to its body, hitching a ride to new soil. This deal has been running for about 400 million years. Same molecule, different stories. Geosmin is why raw beets taste like dirt. It's why catfish and tilapia taste muddy when raised in bad water. Acid breaks it down, which is why every recipe for muddy fish starts with vinegar or lemon juice. Your nose catches all of this at parts-per-trillion. You're smelling a 400-million-year-old conversation between soil bacteria and the bugs that eat them.
Science girl@sciencegirl

That fresh smell after rain is called petrichor. When raindrops hit dry soil, they release plant oils and geosmin from bacteria, creating that rich, earthy scent.

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Keegan Matheson
Keegan Matheson@KeeganMatheson·
Wooden Gnome@vodkaham

@KeeganMatheson mr. matheson, this season has been really rough and this isn’t the news i wanted to see. i want to remain positive and i know theres a long way to go but please for all of the blue jays faithful we need you. release a rendition of the last of barrett’s privateers. save the season

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Josh Yohe
Josh Yohe@JoshYohe_PGH·
Sidney Crosby takes everyone else’s chairs off the ice after the team picture. He is who he is.
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MrBallen Foundation
MrBallen Foundation@MrBallenFnd·
Every survivor deserves to be heard, believed, and supported. That is the heart behind Start by Believing Day, a global campaign led by EVAWI to change how we respond to survivors of sexual assault. It begins with a simple but powerful idea: when someone shares their story, we start by believing them. Too often, survivors are met with doubt or silence. But belief is where healing begins. It creates space for truth, for support, and for the possibility of justice. We believe in advocates who are working every day to ensure survivors are met with compassion, dignity, and care. Because how we respond matters. Start by believing.

When you give to the MrBallen Foundation, every dollar goes directly to Partners like this. Become part of our story. Visit mrballen.foundation #StartByBelievingDay #EVAWI #HonorGrant #MrBallenFoundation #HonoringVictims
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Rory McIlroy
Rory McIlroy@McIlroyRory·
As a kid growing up in Northern Ireland, I dreamed of winning all four majors. Being able to bring these trophies home was truly surreal.
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Eric Engels
Eric Engels@EricEngels·
NBA: need more load management. NHL: need to shed my walking boot and play through a high ankle sprain so I can let the other team avenge that dirty hit I threw three weeks ago.
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Dave Minuk
Dave Minuk@ICdave·
It’s a milestone game for Mark Scheifele as he is playing in his 950th game in a Winnipeg Jets uniform. That matches Thomas Steen for the most games ever played in a Jets uniform in Winnipeg.
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ESPN
ESPN@espn·
For Johnny ❤️
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Jesse Pollock
Jesse Pollock@jpolly22·
Regardless of the outcome… Legacy game for Connor Hellebuyck. One of the greatest goaltending performances we have ever seen.
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Dr. Melanie Murchison
Dr. Melanie Murchison@DrMMurchison·
@KDBauer1 My favourite OD moment is still when Babcock was coaching and the Leafs got pumped by the Pens and @jamiemclennan29 is talking about leaf injuries and @odognine2 goes "Kerfoot.... KERFOOT?!??!?! CROSBY DIDN'T PLAY FOR PITTSBURGH!!!!! CROSBY!!!!!!!" My husband and I still laugh
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Ursula von der Leyen
Ursula von der Leyen@vonderleyen·
Five European nations have determined that Russia poisoned Alexei Navalny. This was a cowardly act from a frightened leader. Russia has long acted as a terrorist state, relying on terrorist methods. 
Poisoning political opponents.
Silencing journalists.
Invading peaceful neighbours. This is the true face of Russia today. We honour the memory of Alexei Navalny and of all those whom Putin’s Russia has violently silenced over the years
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James Duthie
James Duthie@tsnjamesduthie·
Stunning revelation. One of the hockey panelists works out in bare feet in hotel gym. Fair or foul?
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Hayley Wickenheiser
Hayley Wickenheiser@wick_22·
Here is a go fund me for 12 year old Maya and her family who is a little hockey player from Tumbler Ridge. Hockey-do your thing. gofundme.com/f/support-for-…
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Mike Drucker
Mike Drucker@MikeDrucker·
“No, Trump didn’t post the racist video. We just have an unsupervised junior staffer who controls the social media account the President of America uses to announce policies, tariffs, and military attacks”
Sophia Cai@SophiaCai99

The White House has deleted the apes video and a person familiar tells me: “President Trump didn’t see the video (legitimately didn’t), a staffer posted it.” FWIW, only a small handful of staffers have access to his Truth Social account m.

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