Category archives: Science

Ever since the birth of quantum mechanics in the early twentieth century, chemists have struggled with a fundamental paradox. On one hand, Lewis dot structures and molecular drawings teach us to think of electrons as localized entities—either sitting neatly in lone pairs or shared directly between two bonding atoms. On the other hand, Schrödinger’s wave […]

Authors: Thomas M. Pitot, Chercheur postdoctoral en microbiologie, Université du Québec à Chicoutimi (UQAC) and Catherine Girard, Professeure-Chercheure en microbiologie, Université Laval Viruses play a major role in the functioning of ecosystems. They profoundly influence the dynamics of microbial communities, flow of matter and global biogeochemical cycles. Yet despite their abundance and ecological importance, many […]

The world’s population is growing, people are living longer, and industry continues to expand. These changes bring many benefits, but they can also increase risks to human health. Over time, people are exposed to many substances in the environment, some of which may be harmful. At the same time, greater industrial activity means more chemicals […]

Steel and metal production are among the largest contributors to global greenhouse gas emissions, accounting for approximately 10% of global CO2 emissions. At the same time, modern technology relies on tailored steels and metals for applications in fields such as mobility, energy, infrastructure, safety and medicine. Hydrogen-based metal production offers a promising CO2-free alternative and […]

Chemical bonds are among the most familiar ideas in science. They explain why hydrogen and oxygen combine to form water, why carbon atoms build long chains in organic molecules, and why every substance has the shape and properties it does. Yet, despite their central role in chemistry, bonds are not directly observable objects. They are […]

Asteroids and planetesimals regularly bombarded Earth between about 4.6 billion and 3.5 billion years ago, during the Hadean and Archean eons. Because few rocks today are more than 4 billion years old, our understanding of the planet’s environment during that time is limited. However, samples from the moon and its cratered surface hint at the […]

Over a century ago, quantum physics revealed a surprising fact: truly identical particles do not behave like tiny billiard balls. When two indistinguishable particles meet under the right conditions, they can interfere with each other in ways that have no classical explanation. One of the most famous demonstrations of this phenomenon is the Hong–Ou–Mandel effect […]

Author: Kovi Rose, Astrophysics PhD Candidate, University of Sydney Kovi Rose, University of Sydney A pair of stars spiralling around each other. That’s the origin of a new source of repeating radio bursts we’ve detected, called ASKAP J1745. In recent years, astronomers have been puzzling over mysterious bursts of radio signals, known as long-period transients […]

Climate change and sea level rise are altering the chemistry of Biscayne Bay in ways that could threaten South Florida’s coastal ecosystems, water resources, fisheries, and recreation, according to a study led by scientists from the University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science and Miami-Dade County’s Department of Environmental Resources Management […]

Molecules are never truly still. Even in apparently stable matter, atoms vibrate continuously, stretching and bending the chemical bonds that hold them together. These vibrations are not random noise: they determine how molecules absorb light, exchange energy, and undergo chemical reactions. One of the central challenges in chemistry is learning how to direct energy into […]