"Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools."
--1921 New York Times editorial about Robert Goddard's revolutionary rocket work.

"Correction: It is now definitely established that a rocket can function in a vacuum. The 'Times' regrets the error."
NY Times, July 1969.

— New York Times

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Reducing high blood pressure can cut risk of dementia

New Scientist Space - Cosmology - Mon, 04/21/2025 - 12:00pm
Common medications for keeping blood pressure down, including ACE inhibitors, diuretics and calcium channel blockers, also lower the risk of dementia and cognitive impairment
Categories: Astronomy

Reducing high blood pressure can cut risk of dementia

New Scientist Space - Space Headlines - Mon, 04/21/2025 - 12:00pm
Common medications for keeping blood pressure down, including ACE inhibitors, diuretics and calcium channel blockers, also lower the risk of dementia and cognitive impairment
Categories: Astronomy

How Pope Francis Influenced Global Climate Change Action

Scientific American.com - Mon, 04/21/2025 - 12:00pm

The late Pope Francis supported global climate agreements, advocated for Indigenous people and inspired activism

Categories: Astronomy

A dramatic rethink of Parkinson’s offers new hope for treatment

New Scientist Space - Cosmology - Mon, 04/21/2025 - 12:00pm
Mounting evidence suggests there might be two separate types of the world’s fastest-growing neurological condition. Can this fresh understanding lead to much-needed new treatments?
Categories: Astronomy

A dramatic rethink of Parkinson’s offers new hope for treatment

New Scientist Space - Space Headlines - Mon, 04/21/2025 - 12:00pm
Mounting evidence suggests there might be two separate types of the world’s fastest-growing neurological condition. Can this fresh understanding lead to much-needed new treatments?
Categories: Astronomy

Bacteria That Can Mimic Multi-Cellular Life

Universe Today - Mon, 04/21/2025 - 11:57am

Scientists are still trying to understand the origin of multicellular life. It emerged about 1.2 billion years ago (or even earlier, according to some debated evidence). The timing of multicellular life's appearance on Earth is not the only thing being debated; so are the mechanisms behind it. New research supports the idea that multicellular life began when single-celled bacteria started grouping together.

Categories: Astronomy

Celebrating Earth as Only NASA Can

NASA News - Mon, 04/21/2025 - 11:46am

3 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater) NASA’s Earth Day Poster for 2025 uses imagery from the Landsat mission — a joint mission with USGS — to celebrate our home planet. NASA/USGS/Landsat

Lee esta historia en español aquí.


From the iconic image of Earthrise taken by Apollo 8 crew, to the famous Pale Blue Dot image of Earth snapped by Voyager I spacecraft, to state-of-the-art observations of our planet by new satellites such as PACE (Plankton, Aerosol, Cloud, ocean Ecosystem), NASA has given us novel ways to see our home. This Earth Day, NASA is sharing how — by building on decades of innovation—we use the unique vantage point of space to observe and understand our dynamic planet in ways that we cannot from the ground.


NASA has been observing Earth from space for more than 60 years, with cutting-edge scientific technology that can revolutionize our understanding of our home planet and provide benefits to all humanity. NASA observations include land data that helps farmers improve crop production, research on the air we breathe, and studies of atmospheric layers high above us that protect every living thing on the planet.


“NASA Science delivers every second of every day for the benefit all, and it begins with how we observe our home planet from the unique vantage point of space,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “Our satellites, Mars rovers, astronauts and other NASA Science missions send back beautiful images of our planet, from the smallest of plankton to the pale blue dot, to help give us a comprehensive, detailed view of our home that we especially celebrate each Earth Day.”


NASA data and tools are vital to federal, state, local, and international governments to monitor and manage land, air, and water resources. From mapping the ocean floor to finding critical mineral deposits to alerting land managers when fire risk is high, NASA’s data and information informs nearly every aspect of our economy and our lives.


“Another way NASA celebrates Earth Day is by sharing information about how our science benefits the entire nation, such as by providing U.S. farmers and ranchers with ongoing measurements of water, crop health, wildfire predictions, and knowledge of what is being grown around the world,” said Karen St. Germain, director of NASA’s Earth Science Division at the agency’s headquarters in Washington. “This data informs field level farming and ranching decisions with impact felt as far as the commodity-trading floor and our grocery stores.”


Next up for NASA’s work to help mitigate natural disasters is a mission called NISAR (NASA-ISRO Synthetic Aperture Radar) which is a partnership between NASA and ISRO (India Space Research Organisation). NISAR, which is targeted to launch later this year, will measure land changes from earthquakes, landslides, and volcanos, producing more NASA science data to aid in disaster response. The mission’s radar will detect movements of the planet’s surface as small as 0.4 inches over areas about the size of half a tennis court. By tracking subtle changes in Earth’s surface, it will spot warning signs of imminent volcanic eruptions, help to monitor groundwater supplies, track the melt rate of ice sheets tied to sea level rise, and observe shifts in the distribution of vegetation around the world. 


From our oceans to our skies, to our ice caps, to our mountains, and to our rivers and streams, NASA’s Earth observations enhance our understanding of the world around us and celebrate the incredible planet we call home.


To download NASA’s 2025 Earth Day poster, visit:

https://science.nasa.gov/multimedia/earth-day-2025-poster

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Celebrating Earth as Only NASA Can

NASA - Breaking News - Mon, 04/21/2025 - 11:46am

3 min read

Preparations for Next Moonwalk Simulations Underway (and Underwater) NASA’s Earth Day Poster for 2025 uses imagery from the Landsat mission — a joint mission with USGS — to celebrate our home planet. NASA/USGS/Landsat

Lee esta historia en español aquí.


From the iconic image of Earthrise taken by Apollo 8 crew, to the famous Pale Blue Dot image of Earth snapped by Voyager I spacecraft, to state-of-the-art observations of our planet by new satellites such as PACE (Plankton, Aerosol, Cloud, ocean Ecosystem), NASA has given us novel ways to see our home. This Earth Day, NASA is sharing how — by building on decades of innovation—we use the unique vantage point of space to observe and understand our dynamic planet in ways that we cannot from the ground.


NASA has been observing Earth from space for more than 60 years, with cutting-edge scientific technology that can revolutionize our understanding of our home planet and provide benefits to all humanity. NASA observations include land data that helps farmers improve crop production, research on the air we breathe, and studies of atmospheric layers high above us that protect every living thing on the planet.


“NASA Science delivers every second of every day for the benefit all, and it begins with how we observe our home planet from the unique vantage point of space,” said Nicky Fox, associate administrator, Science Mission Directorate at NASA Headquarters in Washington. “Our satellites, Mars rovers, astronauts and other NASA Science missions send back beautiful images of our planet, from the smallest of plankton to the pale blue dot, to help give us a comprehensive, detailed view of our home that we especially celebrate each Earth Day.”


NASA data and tools are vital to federal, state, local, and international governments to monitor and manage land, air, and water resources. From mapping the ocean floor to finding critical mineral deposits to alerting land managers when fire risk is high, NASA’s data and information informs nearly every aspect of our economy and our lives.


“Another way NASA celebrates Earth Day is by sharing information about how our science benefits the entire nation, such as by providing U.S. farmers and ranchers with ongoing measurements of water, crop health, wildfire predictions, and knowledge of what is being grown around the world,” said Karen St. Germain, director of NASA’s Earth Science Division at the agency’s headquarters in Washington. “This data informs field level farming and ranching decisions with impact felt as far as the commodity-trading floor and our grocery stores.”


Next up for NASA’s work to help mitigate natural disasters is a mission called NISAR (NASA-ISRO Synthetic Aperture Radar) which is a partnership between NASA and ISRO (India Space Research Organization). NISAR, which is targeted to launch later this year, will measure land changes from earthquakes, landslides, and volcanos, producing more NASA science data to aid in disaster response. The mission’s radar will detect movements of the planet’s surface as small as 0.4 inches over areas about the size of half a tennis court. By tracking subtle changes in Earth’s surface, it will spot warning signs of imminent volcanic eruptions, help to monitor groundwater supplies, track the melt rate of ice sheets tied to sea level rise, and observe shifts in the distribution of vegetation around the world. 


From our oceans to our skies, to our ice caps, to our mountains, and to our rivers and streams, NASA’s Earth observations enhance our understanding of the world around us and celebrate the incredible planet we call home.


To download NASA’s 2025 Earth Day poster, visit:

https://science.nasa.gov/multimedia/earth-day-2025-poster

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Colorful Eagle Nebula glows in stunning new image from Hubble Telescope

Space.com - Mon, 04/21/2025 - 11:24am
A breathtaking new image of the famous Eagle Nebula captures a towering pillar of gas and dust sculpted by intense stellar radiation.
Categories: Astronomy

Treating High Blood Pressure Reduces Dementia Risk

Scientific American.com - Mon, 04/21/2025 - 11:00am

Lowering blood pressure through medication can reduce someone's risk of developing dementia

Categories: Astronomy

Quantum Computer Makes Random-Number Breakthrough

Scientific American.com - Mon, 04/21/2025 - 10:30am

Quantinuum’s 56-bit trapped-ion computer has succeeded in demonstrating randomness in quantum circuits to establish secure, private connections

Categories: Astronomy

Sols 4515-4517: Silver Linings

NASA News - Mon, 04/21/2025 - 10:29am
Curiosity Navigation

3 min read

Sols 4515-4517: Silver Linings This image was taken by Left Navigation Camera onboard NASA’s Mars rover Curiosity on Sol 4514 NASA/JPL-Caltech

Written by Lucy Thompson, Planetary Geologist at University of New Brunswick

Earth planning date: Friday, April 18, 2025

As the APXS operations person today, I was hopeful that we could plan a compositional measurement after brushing one of the bedrock blocks in front of the rover. However, it soon became clear that the rover was not on stable enough ground to safely unstow the arm and place APXS and MAHLI. Silver linings though; by not having any arm movement in this plan, which requires significant energy, we were able to conserve power for what we hope will be a busy week of upcoming science activities as we drive towards our next high priority area of interest – the so-called boxwork formations. These are large resistant ridges identified from orbit, which may be the result of fracturing, fluid flow and alteration within the sulfate unit that we are traversing through. We plan to image them on approach to gain insights into their context.

Despite the loss of arm activities, we still have plenty of interesting observations planned for this 3-sol weekend. ChemCam will fire its laser at two separate rock targets, “Santa Ynez” and “Cahuilla”, which will also be captured with Mastcam documentation images. The targets are on two different bedrock blocks with the “Cahuilla” raster focused on a thin resistant layer. ChemCam will also use its remote imaging capabilities to obtain mosaics of the “Texoli” butte and another interesting feature, “Torote Bowl”. Mastcam will capture mosaics of “San Gabriel River” (an apparent angular contact) and of some sand troughs surrounding many of the bedrock blocks in this region. An image will also be acquired of a small, grey float pebble, “Piru Creek.”

The environmental science group was also able to plan a number of activities to catch up on their regular cadence, which has been impacted by the recent power constraints. We are acquiring Navcam line of sight observations (x2), suprahorizon movies (x2), a zenith movie and a 360 degree sky survey, as well as a Mastcam sky survey. Coordinated ChemCam passive sky and APXS atmospheric observations are also planned.

There is a ~19 m drive planned through this tricky terrain that will hopefully set us up for arm activities (APXS and MAHLI) in our new workspace next week. The plan is completed with standard RAD, DAN and REMS activities, as well as two MARDI images to record the terrain beneath the rover in the current and new workspace.

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Sols 4515-4517: Silver Linings

NASA - Breaking News - Mon, 04/21/2025 - 10:29am
Curiosity Navigation

3 min read

Sols 4515-4517: Silver Linings This image was taken by Left Navigation Camera onboard NASA’s Mars rover Curiosity on Sol 4514 NASA/JPL-Caltech

Written by Lucy Thompson, Planetary Geologist at University of New Brunswick

Earth planning date: Friday, April 18, 2025

As the APXS operations person today, I was hopeful that we could plan a compositional measurement after brushing one of the bedrock blocks in front of the rover. However, it soon became clear that the rover was not on stable enough ground to safely unstow the arm and place APXS and MAHLI. Silver linings though; by not having any arm movement in this plan, which requires significant energy, we were able to conserve power for what we hope will be a busy week of upcoming science activities as we drive towards our next high priority area of interest – the so-called boxwork formations. These are large resistant ridges identified from orbit, which may be the result of fracturing, fluid flow and alteration within the sulfate unit that we are traversing through. We plan to image them on approach to gain insights into their context.

Despite the loss of arm activities, we still have plenty of interesting observations planned for this 3-sol weekend. ChemCam will fire its laser at two separate rock targets, “Santa Ynez” and “Cahuilla”, which will also be captured with Mastcam documentation images. The targets are on two different bedrock blocks with the “Cahuilla” raster focused on a thin resistant layer. ChemCam will also use its remote imaging capabilities to obtain mosaics of the “Texoli” butte and another interesting feature, “Torote Bowl”. Mastcam will capture mosaics of “San Gabriel River” (an apparent angular contact) and of some sand troughs surrounding many of the bedrock blocks in this region. An image will also be acquired of a small, grey float pebble, “Piru Creek.”

The environmental science group was also able to plan a number of activities to catch up on their regular cadence, which has been impacted by the recent power constraints. We are acquiring Navcam line of sight observations (x2), suprahorizon movies (x2), a zenith movie and a 360 degree sky survey, as well as a Mastcam sky survey. Coordinated ChemCam passive sky and APXS atmospheric observations are also planned.

There is a ~19 m drive planned through this tricky terrain that will hopefully set us up for arm activities (APXS and MAHLI) in our new workspace next week. The plan is completed with standard RAD, DAN and REMS activities, as well as two MARDI images to record the terrain beneath the rover in the current and new workspace.

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How did this ancient black hole get so big?

Space.com - Mon, 04/21/2025 - 9:10am
While it's much smaller than the largest supermassive black holes detected, it's still a whopper considering how early in the history of the universe it appeared.
Categories: Astronomy

A floating laboratory will uncover the secrets of Arctic winter

New Scientist Space - Cosmology - Mon, 04/21/2025 - 9:00am
The Tara Polar Station, a $23 million research vessel with a crew of 12, will drift across the Arctic ice to enable better monitoring of a rapidly changing environment
Categories: Astronomy

A floating laboratory will uncover the secrets of Arctic winter

New Scientist Space - Space Headlines - Mon, 04/21/2025 - 9:00am
The Tara Polar Station, a $23 million research vessel with a crew of 12, will drift across the Arctic ice to enable better monitoring of a rapidly changing environment
Categories: Astronomy

Why GLP-1 Weight-Loss Drugs Are Hard to Make into Pills

Scientific American.com - Mon, 04/21/2025 - 7:30am

Some experts say oral versions of popular weight-loss drugs such as Wegovy could offer people more flexibility and accessibility. What’s keeping the pills from taking off?

Categories: Astronomy

Keeping Kids Interested in Science Is a Matter of Language

Scientific American.com - Mon, 04/21/2025 - 7:00am

As children get older, their understanding of science and being a scientist changes. The words adults use are a critical part of keeping them engaged in discovery

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Stone Age dog skeleton hints at complex early relationship with pets

New Scientist Space - Cosmology - Mon, 04/21/2025 - 6:00am
A nearly complete skeleton found in a cave in France belonged to a group known as the Palaeolithic dogs and its skeleton suggests it had a confusing relationship with humans
Categories: Astronomy

Stone Age dog skeleton hints at complex early relationship with pets

New Scientist Space - Space Headlines - Mon, 04/21/2025 - 6:00am
A nearly complete skeleton found in a cave in France belonged to a group known as the Palaeolithic dogs and its skeleton suggests it had a confusing relationship with humans
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