Right-hand dominance has persisted across millennia and cultures, and researchers link it to how the human brain specialised alongside upright walking.
Around 90% of humans are right-handed, a proportion stable across millennia.
Left-brain dominance for language also favours fine motor control of the right hand.
Bipedal walking freed the hands and accelerated brain specialisation for tools and communication.
A research team claims to have identified the first clear precursors of a powerful solar flare hours before it erupted — a potential breakthrough for space weather forecasting.
Researchers spotted signs of the X9 flare several hours before it occurred.
X-class flares can disrupt satellites, power grids and radio communications.
The finding could underpin early-warning systems for extreme solar events.
74,000 years ago, a supervolcano in Sumatra triggered the most violent eruption of the past million years. The genetic bottleneck theory remains contested but compelling.
The Toba supervolcano erupted 74,000 years ago, ejecting over 2,800 cubic kilometres of material.
The bottleneck theory holds that the human population fell to just a few thousand individuals after the disaster.
Recent archaeological discoveries challenge the full extent of Toba's demographic impact.