'Doomsday' climate tipping points have wiggle room: study

Global warming thresholds that could tip massive ice sheets into irreversible melting or see the Amazon rainforest shrivel into savannah have "grace periods", giving humanity more time to draw down planet-warming carbon emissions, ...

Social animals have tipping points, too

In relatively cool temperatures, Anelosimus studiosus spiders lay their eggs and spin their webs and share their prey in cooperative colonies from Massachusetts to Argentina. Temperatures may vary, but the colonies continue ...

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