In mathematics, and more specifically in algebraic topology and polyhedral combinatorics, the Euler characteristic (or Euler number, or Euler–Poincaré characteristic) is a topological invariant, a number that describes a topological space's shape or structure regardless of the way it is bent.

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The configuration of green spaces in cities determines the characteristics of their birds

What characteristics help tumor cells spread?

What are the characteristics of foreshocks for large earthquakes?

Software to untangle genetic factors linked to shared characteristics among different species

How genes, brain characteristics and intelligence are connected

Turtles and crocodiles with unique characteristics are more likely to go extinct

“Harmless” Bacteria Species Developing Alarming Number of Potentially Harmful Characteristics

Global study identifies neighborhood characteristics that promote walking and cycling

Researchers develop new tool for studying multiple characteristics of a single cell

New research examines what makes life fulfilling, including the role of antecedents of a fulfilled life, like personal characteristics (curiosity); cognitive/emotional evaluations (being free of regret, achieving self-development goals); and the sources of fulfillment (savoring life, spirituality).

Newly-Discovered Bacterium Species Has Unique Multicellular Characteristics

Which weather characteristics affect agricultural and food trade the most?

The plot thickens: new study reveals complex identity of ancient Britons. Do bones and teeth found in Sussex share characteristics with Neanderthal fossils from northern Spain?

Characteristics of older forests can buffer effects of climate change for some bird species

A study of characteristics of U.S. presidential candidate supporters finds, among other things, preference for Trump was predicted by lower Openness and higher Volatility, but lower Compassion and higher Industriousness. Support for Biden was predicted by higher Compassion, Intellect, and Withdrawal

Characteristics of stable Vitiligo skin disease

Scientists identify characteristics to better define long COVID

Immune cell characteristics mapped across multiple tissues, from early life to adulthood

Do You Want a Long Healthy Lifespan? The Characteristics of a “Longevity Diet”

New article outlines the characteristics of a 'longevity diet'