Why does something exist rather than nothing? This profound question lies at the heart of both science and philosophy, inviting us to explore the origins of our existence.
In the field of evolutionary theory, we understand that all life on Earth can be traced back to a common ancestor known as the last universal common ancestor (LUCA). The search for LUCA captivates researchers investigating the origin of life. Our curiosity doesn't end there, though. We can delve further into the origins of Earth itself, and the Universe around it.
From a cosmological perspective, we discover a breathtaking connection between the birth of stars, the formation of planets and the expansion of the Universe. The dance of cosmic creation unfolds through a delicate interplay between the Universe's expansion rate, the gravitational collapse of dark matter and the capture of hydrogen - the life-giving element necessary for star formation. Without this intricate cosmic choreography, life as we know it wouldn't have come into existence.
Thus, our cosmic origin story begins with a fundamental question: What was the origin of the expanding spacetime of the Universe?
The prevailing model of the expanding Universe is often referred to as Big Bang Cosmology. Coined by the English astronomer Fred Hoyle during a BBC Radio broadcast in March 1949, this theory suggests that all matter in the Universe originated from a colossal explosion at a specific time in the distant past.
Denne historien er fra August 2023-utgaven av BBC Science Focus.
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Denne historien er fra August 2023-utgaven av BBC Science Focus.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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COULD MARINE CLOUD BRIGHTENING HELP US FIGHT CLIMATE CHANGE?
The theory behind marine cloud brightening is that brighter or whiter clouds reflect more sunlight back into space.
IS IT SAFE TO RUN EVERY DAY, OR SHOULD I DITCH MY RUN STREAK TO SAVE MY KNEES?
A running streak, where you run every day without taking rest days, can be highly motivating and beneficial for overall fitness. Running is great cardiovascular exercise and isn't to be discouraged (and finding a routine with some consistency is great). Getting a bit of exercise as often as possible is also hugely beneficial for your mental health.
WHAT MAKES THE MEDITERRANEAN DIET SO GOOD FOR US?
The Mediterranean diet may help you live longer, especially if you also adopt the lifestyle of people living near the Med during the 1950s.
WHAT IS MEXICO'S BLUE HOLE?
The world's deepest blue hole (marine sinkhole) lies off the coast of Mexico's Yucatán Peninsula. It's at least 420m (1,378ft) deep, but explorers still haven't found its bottom.
HOW CAN I TELL IF I'VE GOT HIGH CORTISOL LEVELS?
Cortisol is a hormone produced by glands in our bodies called the adrenal glands, which sit above the kidneys. It plays a critical role in various bodily functions, including regulating metabolism, reducing inflammation and helping the body respond to stress. While essential for our health, chronic elevation of cortisol levels can lead to several issues.
THE LUNGFISH
In 1836, European scientists discovered a peculiar animal from the River Amazon that they struggled to identify. Its eel-like body was a few feet long and its air-filled lungs persuaded anatomists it must be a reptile.
ARE WE THE ONLY SPECIES TO HAVE BEEN THROUGH A STONE AGE?
The Stone Age might conjure up images of early humans, sitting around a campfire or hunting prehistoric beasts, but evidence shows that we're not the only species that has learned how to work with stone tools. Wild chimpanzees (Pan troglodytes) use stone tools to crack open nuts.
Should we scrap daylight saving time?
Most of us look forward to the extra hour we get in bed every October, but researchers argue that changing the clocks twice a year harms our health
THE INTERNET OF ANIMALS
SCIENTISTS ARE USING ELECTRONIC TAGS AND SATELLITES TO TRACK WILD ANIMALS AND CREATE A DATA NETWORK THAT COULD HELP US ADDRESS THE BIODIVERSITY CRISIS
MUSIC FOR A DISTRACTED GENERATION
The number of things competing for our attention is often overwhelming. Can dreamy soundscapes created with neuroscience help our bewildered brains to concentrate?
