Earth has experienced cold periods (informally referred to as “ice ages,” or "glacials") and warm periods (“interglacials”) on roughly 100,000-year cycles for at least the last 1 million years. The last of these ice age glaciations peaked* around 20,000 years ago.
The "100,000-year problem" refers to an apparent unexplained change in the frequency of inter-glacial periods which occurred about a million years ago. Before that, inter-glacial periods seemed to occur about every 41,000 years, in line with the obliquity Milankovich cycle.
What happens to the Earth's orbit every 100,000 years?
Over approximately 100,000 – 400,000 years, gravitational forces slowly change Earth's orbit between more circular and elliptical shapes, as indicated by the blue and yellow dashed ovals in the figure to the right. Over 19,000 – 24,000 years, the direction of Earth's tilt shifts (spins).
Why is the 100,000-year ice sheet cycle a mystery?
As the 100,000-year periodicity only dominates the climate of the past million years, there is insufficient information to separate the component frequencies of eccentricity using spectral analysis, making the reliable detection of significant longer-term trends more difficult, although the spectral analysis of much ...
Why Earth Enters Ice Ages Every 100,000 Years: The Hidden Pattern | Documentary for Sleep
What did Stephen Hawking say about global warming?
Back in July 2017, prior to a conference held to mark his 75thbirthday, he warned: “We are close to the tipping point where global warming becomes irreversible” (Futurism). This means that now more than ever, is the time to take every action in mitigating against some of the worst impacts of climate change.
One thing their model doesn't account for: How human-made carbon emissions could change these processes. Earth's last ice age ended around 11,700 years ago and a new study predicts the next one should be 10,000 years away.
The discovery and exploration of Antarctica was shaped by the continent's remoteness and its extraordinarily inhospitable environment. These factors combined for centuries to keep humans away from all but the subantarctic islands and parts of the Southern Ocean where whaling and sealing took place.
The text of Job contains some hints that Job indeed lived during the ice age. The book of Job has more references to ice than any other book of the Bible (Job 6:16, 37:10, 38:29). [5] The book of Job also has five references to snow – more than any other book of the Bible (Job 6:16, 9:30, 24:29, 37:6, 38:22).
Yes, Earth faced significant dangers in 2025, primarily from ongoing climate change, with 2025 being one of the hottest years on record, nearing the critical 1.5°C warming threshold, leading to intensified extreme weather, alongside risks from emerging diseases, biodiversity loss, and potential asteroid impacts (though specific 2025 asteroids passed safely).
What does the Bible say the Earth will be destroyed by?
On the day that Christ returns (i.e., “the last day”), all of the dead will be raised at the same time (John 5:28-29) and all people will be removed from the earth (1 Thess. 4:16-17). At that time, the Bible plainly teaches that this material planet, and everything in it, will be destroyed by fire.
Yes, when you look at the Sun, you are seeing it as it was about 8 minutes and 20 seconds in the past because that's how long it takes sunlight to travel the ~93 million miles to Earth, meaning we're always seeing the Sun's "past" light, and this concept extends to all celestial objects, showing us farther back in time the farther away they are.
We are currently in an interglacial warm period that has lasted about 10,000 years and the next glaciation is overdue. During glaciations, ice sheets advance from the poles, destroying virtually all life in their wake.
Climate change, AI, job disruption, population growth, and mental health challenges will completely reshape how humans live and survive. This short video explores how humans may survive in 2050 — through adaptability, emotional intelligence, continuous learning, health awareness, and responsible use of technology.
Scientists have uncovered a missing feedback in Earth's carbon cycle that could cause global warming to overshoot into an ice age. As the planet warms, nutrient-rich runoff fuels plankton blooms that bury huge amounts of carbon in the ocean.
2025 is shaping up to be among the warmest years on record, behind 2024 but rivaling 2023. Globally, northern hemisphere summer temperature records are being broken in some big and shocking ways, from the Arctic to Oceania, and in many places in between.
Stephen Hawking's "last warning" focused on two key existential threats: Artificial Intelligence (AI), which he feared could surpass and supersede humanity if mismanaged, and the need for humanity to colonize other planets to survive growing risks like overpopulation and climate change, advocating for a new space age to ensure our long-term survival. He warned in 2014 that full AI could "spell the end of the human race," as it could redesign itself at an increasing rate, making humans obsolete. In his final years, he stressed that Earth's problems (like population growth, climate issues) meant we needed to become a multi-planetary species to avoid self-destruction, a goal he hoped a new space program would accelerate.
What did David Attenborough say about global warming?
Our greatest threat in thousands of years. Climate change. If we don't take action, the collapse of our civilisations and the extinction of much of the natural world is on the horizon.
Stephen Hawking's estimated IQ at the time of his death was 160. Is the challenge (or ease) of imminent death directly proportional to your IQ? Anyway, here's to Hawking, 1/8/42-3/14/18.
