International

Learn about seven important NASA discoveries

Photo: NASA

October 15 |

As part of the commemoration of the discovery of the exoplanet Kepler 452-b, by the National Aeronautics and Space Administration (NASA) of the United States (U.S.), this Sunday is worth knowing seven important discoveries of this U.S. agency in recent years.

The cosmic body identified by the Kepler telescope, to which it owes its name, was confirmed by NASA on July 23, 2015.

Kepler-452b is an exoplanet, a planet revolving around a star other than the Sun, which in this case is a G2-type yellow dwarf, which is known as Kepler-452.

The agency responsible for the civil space program, as well as for aeronautical and aerospace research, since its foundation in 1958 has developed space exploration and science projects, which have led to relevant discoveries in several aspects.

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1) The study of twins
In April 2019 NASA published the controversial results of an investigation known as the Twins Study.

A set of ten teams of researchers from the United States (U.S.) set out to observe the changes that might occur to a human being when exposed to the risk of traveling into space for a year.

The scientists compared a wide range of samples and measurements from identical twin brothers, retired astronauts Scott Kelly and Mark Kelly. Scott was sent into space, while Mark remained on Earth.

One of the results revealed the lengthening of the space-bound twin’s telomeres, special features at the ends of each strand of DNA that generally shorten with age, which demonstrated how a human body can adapt to a variety of changes generated by the environment of outer space flight.

2) Observing the Earth from space
There are a wide variety of scientific studies based on images that NASA crew members take using Crew Earth Observations (CEO).

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NASA’s orbiting space station carries its crew and cameras over different points on Earth at different times and the station revisits the sites at varying intervals, allowing images of many areas to be collected at different times of the day and night.

In this way experts discovered that artificial lighting at night affects the behavior of urban wildlife, according to a study of light levels in the city of Chicago that was based on images taken by astronauts from the International Space Station (ISS).

3) A revealing microscope
A miniaturized fluorescence microscope made it possible to observe changes in living cells in microgravity.

This microscope enables real-time analysis of cell behavior during long-duration spaceflight. Its rapid imaging capability allows monitoring of cellular and molecular reactions that can happen more rapidly in altered gravity environments.

The implementation of real-time analysis methods on the station furthers the understanding of how cells in the human body react and adapt to the space environment.

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4) The universe in better resolution
NASA’s Neutron Star Interior Composition Explorer (Nicer) facilitates measurements with excellent precision of neutron stars, objects containing ultra-dense matter at the threshold of black hole collapse.

In early 2018 JAXA’s All-Sky X-ray Imaging Monitor (MAXI) captured a new transient X-ray source in the sky designated MAXI J1820 + 070.

Nicer began monitoring the source and discovered that it was a binary black hole system with a mass much larger than that of the Sun. In addition, recorded measurements have revealed how the inner edge of a black hole’s accretion disk (and the corona above it) vary in size and shape as a black hole consumes material from a companion star.

5) Spaceflight decreases crew performance on Earth.
Astronauts’ bodies adapt to microgravity while in space. When crew members return to Earth, they show significant decreases in manual dexterity, multitasking, motion perception, and the ability to operate a vehicle.

NASA researchers confirmed that the post-flight performance decline was related to spaceflight factors and not to other factors such as lack of practice or sleep.

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6) Cement in space
Another discovery confirmed by NASA suggests the possibility of building places to live on the Moon or Mars.

It is a research called Microgravity Investigation of Cement Solidification (MICS), which reveals that samples processed in space show considerable changes in the microstructure of cement compared to those processed on Earth, such as increased porosity, or the presence of more open spaces.

Showing that cement can harden in space is of great importance for future lunar constructions.

7) Keep it clean
New materials are needed to slow the growth and spread of bacteria resistant to antibiotics and silver coatings, according to research called Biorisk-KM-Metally, conducted by the Russian space agency (Roscosmos) and confirmed by NASA.

The researchers conducted tests on an antimicrobial coating called AGXX® and compared it with silver and stainless steel coatings. For the study, crew members placed 12 plates on the space station’s toilet door, with one plate coated in each tested material to be collected at six, 12 and 19 months.

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In all time lapses, the experts found that the AGXX® coating had significantly fewer bacteria than surfaces coated with silver and stainless steel. These data are useful for the development of ideal technologies to reduce the risk of biological damage to space hardware and equipment.

International

Spain’s irregular migrant population rises to 840,000, study finds

The number of migrants living in Spain without legal residency status continues to rise and has reached 840,000 people, with 91% originating from the Americas, particularly Colombia, Peru and Honduras, according to a report by the Spanish think tank Funcas (Foundation of the Savings Banks).

An estimated 17.2% of the non-EU foreign population living in Spain is in an irregular administrative situation. The estimate is based on the gap between the number of foreign residents effectively living in Spain, according to the National Statistics Institute (INE), and those who hold a residence permit, benefit from international protection, or are in the process of obtaining it.

The data, as of January 1, 2025, point to a notable and sustained increase in irregular migration since 2017, when the estimated figure stood at around 107,000 people, representing 4.2% of the non-EU population residing in Spain.

By origin, migrants from the American continent stand out, totaling around 760,000 people, or 91% of all irregular migrants. Colombians account for nearly 290,000, followed by Peruvians with almost 110,000, and Hondurans with about 90,000. Migrants from Africa (50,000), Asia (15,000) and Europe (14,000) trail far behind.

The figures predate Spain’s latest immigration regulation reform, which came into force in May 2025 and introduces measures to ease access to legal status through residency ties. According to Funcas, the reform would, in principle, tend to reduce the number of migrants in an irregular situation.

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International

Historic snowstorm paralyzes Toronto after 60 centimeters of snow

Toronto, Canada’s largest city and the fourth most populous in North America, was largely paralyzed on Monday after a historic snowstorm dumped up to 60 centimeters of snow and sent temperatures plunging to -15 degrees Celsius, authorities said.

Late Sunday, as the scale of the snowfall became clear, city officials declared a climate emergency, triggering extraordinary measures including parking bans on several major streets to facilitate snow removal operations.

Toronto’s public transit authority reported that while some buses remain immobilized, subway and streetcar services are operating with relative normality, though localized disruptions may occur.

A similar situation is affecting the city’s commuter rail network, which remains operational but is experiencing significant delays on its main routes due to the severe weather conditions.

International

Venezuela frees at least 80 political prisoners, NGO says

At least 80 political prisoners were released on Sunday across Venezuela, human rights group Foro Penal reported, as the broader process of detainee releases continues at a slow pace under the interim government.

Foro Penal’s director, Alfredo Romero, wrote on social media platform X that verified releases took place nationwide and that the figure could rise as more confirmations are completed.

Attorney Gonzalo Himiob, also from Foro Penal, said the excarcelations occurred during the early hours of the day and emphasized that the number is not yet final pending further verification.

The releases are part of a series of steps announced by Venezuela’s interim leader, Delcy Rodríguez, who took power after the capture of former President Nicolás Maduro in a U.S. military operation on Jan. 3, 2026. Rodríguez has pledged a significant number of liberations but has been criticized by opposition groups and rights organizations for the slow and nontransparent nature of the process.

So far, the Venezuelan government reports that 626 detainees have been freed since December, though independent counts by human rights groups suggest the number of actual political prisoner releases is lower and that many remain behind bars.

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Families of those still detained have maintained vigils outside prisons, hopeful for further releases even as broader concerns about political imprisonment and due process persist.