Why has Earth got hotter now than it was 100,000 yrs ago?

As scorching heat grips large areas of the Earth, many people are trying to put the extreme temperatures into context and asking: When was it ever this hot before?

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Globally, 2023 has seen some of the hottest days in modern measurements, but what about farther back, before weather stations and satellites?

Some news outlets have reported that daily temperatures hit a 100,000-year high.As a paleoclimate scientist who studies temperatures of the past, I see where this claim comes from, but I cringe at the inexact headlines.

While this claim may well be correct, there are no detailed temperature records extending back 100,000 years, so we don’t know for sure.