Science

In the vast expanse of the cosmos, planets are born from swirling disks of gas and dust that encircle young stars. This intriguing process of planet formation has captivated astronomers, and understanding it is a key objective of the James Webb Space Telescope (JWST). One of the most promising targets in this quest is PDS 70, a nearby star that is home to two nascent planets, PDS 70b and PDS 70c, which are among the few exoplanets that have been directly imaged.

Hidden beneath layers of rock and molten metal, Earth’s inner core has long been perceived as a solid sphere. However, a groundbreaking study has revealed that this core is undergoing significant structural changes, suggesting that the center of our planet is far more dynamic than previously thought. This revelation could dramatically alter our understanding of Earth’s evolution, its magnetic field, and its rotational behaviors.

Earth’s interior is often likened to a colossal layer cake, consisting of four main layers: the crust, mantle, outer core, and inner core. The crust is the thin outermost layer where human life resides and is divided into massive tectonic plates that are in constant motion. Beneath this crust lies the mantle, a semi-solid layer approximately 1,800 miles deep, composed of hot rock that drives tectonic activity, leading to earthquakes and volcanic eruptions.

In a stunning revelation that has captured the attention of scientists and space enthusiasts alike, NASA’s Juno probe has recorded the most powerful volcanic eruption ever observed in the Solar System. This extraordinary event occurred not on Earth, but on Jupiter’s moon, Io, a celestial body renowned for its extreme volcanic activity.

Since its launch, the Juno spacecraft has been orbiting Jupiter, providing invaluable insights into the mysteries of the Jovian system. During a flyby in December 2024, Juno’s advanced instruments detected an eruption of unprecedented magnitude, surpassing any previously documented volcanic activity on Io. This discovery serves as a testament to the dynamic and ever-evolving nature of our Solar System.

On Tuesday afternoon, February 13, 2025, SpaceX is poised to launch a Falcon 9 rocket carrying 21 Starlink satellites into low-Earth orbit. The launch is scheduled to take place at 1:53 p.m. from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station, with backup launch windows extending until 3:43 p.m. for any unforeseen delays.

This mission marks a significant milestone as it will be the 18th flight for the Falcon 9’s first stage booster, which has a storied history of successful missions. The booster has previously supported a variety of important launches, including Crew-5, CRS-28, and several other satellite deployments. Notably, it has also completed 10 missions dedicated to the Starlink project, which aims to provide global internet coverage through a constellation of satellites.

In the vast depths of the ocean, the struggle for survival takes on many forms, even among the largest creatures on Earth. Recent research has shed light on an intriguing aspect of whale behavior: the use of sound as a stealthy method of avoiding predation by killer whales. This study categorizes different whale species into two distinct groups—those that choose to fight and those that prefer to flee.

The fight group includes species such as North Atlantic right whales, bowhead whales, humpbacks, and grey whales. These whales tend to be slower-moving and often give birth in shallow waters, where they can defend their calves against the formidable killer whales. In contrast, the flight group, which includes blue, fin, sei, minke, and Bryde’s whales, opts for a different strategy. These whales are faster and typically have their young in the open ocean, where they can quickly escape from approaching orcas.

In a bold announcement, President Donald Trump has set an ambitious goal for humanity: landing astronauts on Mars by the end of his presidential term in 2029. While this vision sparks excitement, experts in the field of space exploration are raising significant questions about its feasibility. Despite the recent advancements in space technology, particularly with SpaceX’s development of the Starship rocket, the challenges that lie ahead for a crewed mission to Mars are daunting.

For over six decades, scientists have been captivated by the Search for Extraterrestrial Intelligence (SETI), seeking signs of technological activity beyond our planet. While the quest has typically focused on detecting radio signals from distant stars, researchers are now expanding their horizons to explore a range of potential “technosignatures.” These include various forms of communication—such as directed energy and gravitational waves—as well as the search for massive structures, notably Dyson spheres.

Imagine taking a leisurely stroll along a picturesque coastline, only to stumble upon remnants of a prehistoric meal from 66 million years ago. This extraordinary event occurred recently on the Stevns Klint Coastal Cliffs in Denmark, a UNESCO World Heritage site known for its rich fossil record.

Peter Bennicke, an amateur fossil enthusiast, was out for a casual walk when he noticed unusual fragments embedded in the chalky cliffs. Upon closer examination, these fragments turned out to be pieces of sea lily, a type of marine invertebrate. Intrigued by his find, Bennicke took the fragments to the Museum of East Zealand for further investigation, leading to a remarkable revelation.

In a groundbreaking discovery, astronomers have identified a fascinating super-Earth exoplanet, HD 20794d, located just 19.7 light-years away from our solar system. This intriguing planet orbits its star in a highly eccentric path, dipping in and out of the habitable zone—a region where conditions may allow for liquid water to exist.

HD 20794d’s orbit is particularly remarkable, as it varies significantly in distance from its star, ranging from as far out as Mars is from the Sun to as close as Venus. This means that during its journey, the planet experiences extreme temperature fluctuations, starting in a frigid zone where liquid water cannot exist, before passing through the habitable zone where conditions may briefly support life.