Sentences with phrase «perhaps by a volcanic eruption»

Flo and her species lived on Flores from about 90,000 years ago until about 14,000 years ago, when they were wiped out — perhaps by a volcanic eruption, or perhaps by competition with modern humans.

Not exact matches

Perhaps worldwide melting of glaciers by global warming will increase the incidence of volcanic eruptions and earthquakes, as well as increasing the intensity of hurricanes.

The models currently assume a generally static global energy budget with relatively little internal system variability so that measurable changes in the various input and output components can only occur from external forcing agents such as changes in the CO2 content of the air caused by human emissions or perhaps temporary after effects from volcanic eruptions, meteorite strikes or significant changes in solar power output.

Major ice sheets didn't develop until about 70,000 years ago, perhaps helped along by a major volcanic eruption in Indonesia that reflected a great deal of sunlight back out into space.

Perhaps, for example, rainfall decreased when soils were dried up by overgrazing, and perhaps cold spells followed an increase in smoke from volcanic eruPerhaps, for example, rainfall decreased when soils were dried up by overgrazing, and perhaps cold spells followed an increase in smoke from volcanic eruperhaps cold spells followed an increase in smoke from volcanic eruptions.

As they stand at present the models assume a generally static global energy budget with relatively little internal system variability so that measurable changes in the various input and output components can only occur from external forcing agents such as changes in the CO2 content of the air caused by human emissions or perhaps temporary after effects from volcanic eruptions, meteorite strikes or significant changes in solar power output.