What’s Causing the Mass Bird Die-Off in the Southwest?

What’s Causing the Mass Bird Die-Off in the Southwest?

Thousands of migrating birds have inexplicably died in the southwestern US, in what ornithologists have described as a national tragedy that is likely related to the climate crisis.

The Bay Area Just Turned Orange. All Eyes Are on PurpleAir

The Bay Area Just Turned Orange. All Eyes Are on PurpleAir

Drawing crowdsourced data from air quality sensors it sells to the public—ranging between $200 and $300—PurpleAir builds maps that show in real time just how bad a neighborhood like mine is suffering from particulate matter (PM) 2.5 pollution, the particles that make up wildfire smoke.

Are Radioactive Diamond Batteries a Cure for Nuclear Waste?

Are Radioactive Diamond Batteries a Cure for Nuclear Waste?

To power something that energy hungry, he says, means “the mass of the battery would be significantly greater than the mass of the vehicle.” Instead, the company is looking at applications where it is either impossible or impractical to regularly change a battery, such as sensors in remote or hazardous locations at nuclear waste repositories or on satellites.

Spree Is Nasty, Clever Satire for the Influencer Era

Spree Is Nasty, Clever Satire for the Influencer Era

(“What’s the point of doing anything if no one’s watching?” Suzanne wonders—a point Kurt echoes repeatedly on his spree.)Like Suzanne, Kurt sees violence as a means to an end, and cannot fathom the purpose of life without an audience.

The Age of Mass Surveillance Will Not Last Forever

The Age of Mass Surveillance Will Not Last Forever

Here’s the thing: Although the global response to this violation was furious, producing the largest intelligence scandal of the modern age, mass surveillance itself continues to work today, virtually unimpeded.

Massachusetts Launches Uber and Lyft's Latest Legal Headache

Massachusetts Launches Uber and Lyft's Latest Legal Headache

On Tuesday, Massachusetts became the second state this year to sue ride-hail companies Uber and Lyft for treating their drivers as independent contractors rather than employees.

The Debate Over Burning Dead Trees to Create Biomass Energy

The Debate Over Burning Dead Trees to Create Biomass Energy

Along with thinning trees in overcrowded forests, Kusel says, biomass projects help rebuild rural communities by creating jobs, all while preventing the massive carbon emissions released in wildfires.Kusel’s projects utilize dead, diseased, and burned trees, along with the small-diameter green trees that he says overcrowd forests and contribute to fire danger.

What Minnesota’s Protests Are Revealing About Covid-19 Spread

What Minnesota’s Protests Are Revealing About Covid-19 Spread

Following the protests, the Minnesota Department of Health changed the criteria for the state’s still-limited supply of tests to include people who’d participated in mass gatherings within the previous week.

Trump’s New Space Force Missile Might Be Too ‘Super-Duper’

Trump’s New Space Force Missile Might Be Too ‘Super-Duper’

That means a super-duper missile would have a velocity of 137 kilometers per second.So if we want a super-duper fast missile, it's going to have to be in space.If you want a missile to go faster, you need more fuel, which will increase the mass.

The Covid-19 Newsletter That's by Doctors for Doctors

The Covid-19 Newsletter That's by Doctors for Doctors

When they’re not treating Covid-19 patients in the intensive care unit, the eight doctors on the FLARE team work a second job: updating fellow physicians on the latest novel coronavirus research and debunking the freshest unproven theories floating around on social media.

The Rise of a Hindu Vigilante in the Age of WhatsApp and Modi

The Rise of a Hindu Vigilante in the Age of WhatsApp and Modi

It didn’t take long for people to realize that the new law, combined with a national citizens register, could easily provide a mechanism for stripping Indian Muslims of their citizenship.

2019 Was 'Probably the Worst Year in a Century' for Australia

2019 Was 'Probably the Worst Year in a Century' for Australia

Record heat and drought across Australia delivered the worst conditions in the country since at least 2000, with river flows, tree cover, and wildlife being hit on an “unprecedented scale,” according to a new report titled Australia's Environment.

Car on a Trampoline: More Kicks With Kinetic Energy

Car on a Trampoline: More Kicks With Kinetic Energy

The car drop happens near the end of the video, starting at 9:20.Even if you don't think this is awesome (c’mon, it’s empirically proven to be awesome), it's still a great source for some physics problems you can work out at home, while we’re all doing this social distancing thing.

Watch Australia's Wildfires Spawn Massive Smoky Thunderclouds

Watch Australia's Wildfires Spawn Massive Smoky Thunderclouds

As the mass climbs higher, the smoky air cools and forms into a pyrocumulonimbus cloud, a soup of water and smoke particles towering miles into the sky.

How Iran's Hackers Might Strike Back After Soleimani's Assassination

How Iran's Hackers Might Strike Back After Soleimani's Assassination

Iran has used wipers like Shamoon and Stone Drill to inflict waves of disruption across neighboring countries in the Middle East, starting with an attack in 2012 that destroyed 30,000 Saudi Aramco computers.

Tesla Cybertruck Vs. a Ford F-150: It's All About Friction

Tesla Cybertruck Vs. a Ford F-150: It's All About Friction

Now it's this video of a tug-of-war between the Cybertruck and a Ford F-150 .It's all about friction and the interaction between the tires and the road.The Tesla Cybertruck, with its steel outer shell, is probably more massive than a Ford F-150.Let's be clear.

Measurements Are Often Full of Lies—and That's OK

Measurements Are Often Full of Lies—and That's OK

Recently in my physics lab, students were having trouble with the difference between mass and weight .Weight is a measure of the downward force an object exerts on whatever is supporting it.

Fly Me to the Moon … With Elephants!

Fly Me to the Moon … With Elephants!

I recently ran across an animation showing a Saturn V rocket during liftoff, but with a small modification.Video: Rhett AllainBefore it was launched, the metal ball was at rest and thus had a momentum of zero.

Physicists Get Close to Knowing the Mass of the Neutrino

Physicists Get Close to Knowing the Mass of the Neutrino

Its measured mass would also serve as a check on cosmologists’ theories for how the universe evolved.“Depending on what the mass of the neutrino turns out to be, it may lead to very exciting times in cosmology,” said Diana Parno, a physicist at Carnegie Mellon University and a member of the KATRIN team.

Tips for Puking in Microgravity and Staying Healthy in Space

Tips for Puking in Microgravity and Staying Healthy in Space

Just ask Mike Massimino , a former NASA astronaut who has flown to space twice for extended stays .Getting medical treatment on the International Space Station is complicated, so NASA does its best to ensure astronauts are in peak physical condition before they leave for the final frontier.

Extreme-Risk Laws Reduce Gun Violence

Extreme-Risk Laws Reduce Gun Violence

But in this case, the threats made the news because local law enforcement officials took preventative action, including obtaining a court order that allowed them to temporarily remove 12 guns from the man's possession.

Mass Graves in Russia Tell the Grim Story of Mongol Invasion

Mass Graves in Russia Tell the Grim Story of Mongol Invasion

Several of the people buried in the pit had much more tooth decay than the rest of the Yaroslavl dead, which actually suggests that they were pretty well-off.

Mass Shootings May Be Contagious. Can We Contain Them?

Mass Shootings May Be Contagious. Can We Contain Them?

Research has shown that suicides, too, can spread like a contagion depending on how they are covered, but a consensus has yet to emerge among media organizations about how to handle mass shootings.

The Twisty Physics of Simone Biles' Historic Triple-Double

The Twisty Physics of Simone Biles' Historic Triple-Double

Once she's in the air, Simone's center of mass will move along with a constant speed—with the same horizontal velocity at which she was running before the jump.A twist is a rotation of the human body about an axis that runs from head to feet.

The Surprisingly Cozy Truths of Sleeping in Space

The Surprisingly Cozy Truths of Sleeping in Space

It’s a far cry from the spacious beds we have on Earth, but it’s still better than the shared sleeping compartment on the space shuttle, which Mike Massimino , a former NASA astronaut, describes as “a big slumber party.” The trick, Massimino says, was to remember to strap your sleeping bag to the wall so your body wouldn’t drift around during the night.

Fact-Check the Physics of Captain America Hammering Thanos

Fact-Check the Physics of Captain America Hammering Thanos

If this interaction force is the only force acting on our two humanoids for the same amount of time, Captain America's change in momentum will be exactly opposite that of Thanos.

Cloudflare Ditches 8chan. What Happens Now?

Cloudflare Ditches 8chan. What Happens Now?

What Happens Now. Cloudflare CEO Matthew Prince announced Sunday that his company would stop providing protection for internet for 8chan, after a series of mass shooting manifestos were posted on the forum.

An Electric Pickup Truck Really Could Pull a Freight Train—Here's How

An Electric Pickup Truck Really Could Pull a Freight Train—Here's How

Here is a force diagram for a tiny object pulling a massive object with no friction. For the train (object B), a frictional force is pulling to the right.

Where Do Supermassive Black Holes Come From?

Where Do Supermassive Black Holes Come From?

This speed limit can theoretically be exceeded if the matter is collapsing fast enough; the Basu and Das model suggests black holes were accreting matter at three times the Eddington rate for as long as the chain reaction was happening.

Former NASA Astronaut Mike Massimino’s Guide to Eating in Space

Former NASA Astronaut Mike Massimino’s Guide to Eating in Space

There’s an entire lab at the Johnson Space Center dedicated to the culinary arts, where NASA chefs—ahem, food tech­nologists —spend their days designing meals that strike the right balance between taste and nutrition.