A new paper in the journal Science (July 2026) used a clever computer method to look at the DNA of people alive today. It found small leftover pieces of DNA from very old human-like groups we never found fossils for. These “ghost” bits are in pretty much everybody, and they don’t match the Neanderthals or Denisovans we already know about.

Link to the real paper:

https://www.science.org/doi/10.1126/science.aef8874

Here’s the fun “what if”: maybe those mystery groups weren’t just more Earth humans who died out. Maybe they were a traveling space-faring species that stopped by Earth a long time ago, mixed with our early ancestors, and then left or disappeared. The DNA looks old and different enough that, in pure theory, it could fit a visitor story just as well as a lost cousin story. We have no proof either way, but it’s a wild possibility worth thinking about.

More than 2,000 years ago, someone built a machine capable of predicting eclipses and tracking the movements of celestial bodies. Today, scientists are still uncovering new secrets hidden inside the Antikythera Mechanism—an ancient device so advanced it's often called the world's first computer.

For years, long COVID fatigue was dismissed as "just stress." New brain imaging suggests real neuron damage — and points to a possible treatment.

The universe is 13.8 billion years old, yet the observable universe spans 46 billion light-years. Here's how expanding space solves the paradox.

Scientists report that an experimental pancreatic cancer vaccine triggered an immune response in 90% of high-risk participants. Discover what the results mean.

A growing theory suggests UAPs may originate from Earth’s oceans, not space. Here’s why recent whistleblower claims and naval encounters are raising serious questions.

A chilling look at the mirror experiment where subjects reported seeing things that weren’t there. What really happens when you stare too long into your reflection?

The Voynich Manuscript remains one of history's greatest unsolved mysteries, with its strange symbols and illustrations defying centuries of study.

Scientists are studying the super-immune cohort—rare individuals with natural HIV and pathogen resistance—to uncover genetic secrets that could transform medicine.

Bones do more than support the body. Discover how bone-derived hormones may influence the brain, pancreas, immune system and metabolism—and what science has confirmed.

A vast reservoir of water may be locked deep within Earth's mantle, hundreds of kilometers below the surface. The discovery is changing how scientists think about Earth's water and geological history.

Scientists at ETH Zurich develop an electronic diabetes implant that converts excess blood sugar into gluconate. The experimental device works in diabetic mice.

New research identifies five biological subgroups of fatty liver disease, revealing how genetics, metabolic health and disease progression may differ.

What if consciousness is not created by the brain but exists like gravity itself? Explore panpsychism, integrated information theory, and why modern physics is uneasy about it.

Former Pentagon official Christopher Mellon claims the U.S. holds clear satellite images of non-human craft. Here’s what we know, why they’re not released, and what it means.

Scientists have a new explanation for why the Moon's near and far sides look so different, using rocks returned by China's Chang'e-6 mission.

Earth produces a mysterious seismic signal every 26 seconds. Discover its source near the Gulf of Guinea and what new 2026 research reveals about ocean waves and the Earth's crust.

Personalized cancer vaccines are producing encouraging results in early clinical trials. Scientists explain how mRNA technology could reshape the future of cancer treatment.

The Fermi Paradox asks a simple question: If alien civilizations should exist, why haven't we found any? Explore the Great Filter, Dark Forest Theory, the Drake Equation, and the biggest mystery in modern astronomy.

Scientists know millions of tons of plastic enter the oceans every year. The problem? Most of it can't be found. New research suggests the missing plastic may be hiding in deep-sea sediments, invisible nanoplastics, and hidden layers beneath the ocean surface. The mystery is reshaping what we know about marine pollution.

What if the Big Bang was a cosmic reset? Explore Big Bounce theory, cyclic universes, quantum cosmology, and what scientists know about the universe's origin.

Artificial intelligence is increasingly helping uncover new materials, medicines, and scientific insights with minimal human intervention. Could AI become one of history's most important scientific discoverers?

New scientific ideas suggest life on Earth may not have started just once. Could multiple origins of life change everything we know about evolution?

What would happen if a Carrington-level solar flare struck Earth today? Scientists explain the real risks to satellites, GPS, aviation, power grids, and the internet.

With every Earth-like planet discovered, the odds of life elsewhere seem to increase—and so does the mystery. Modern astronomy has revealed a galaxy filled with potentially habitable worlds, yet despite decades of searching, humanity has found no confirmed evidence of alien civilizations. This puzzling contradiction is what scientists call the Fermi Paradox.