Stories by Jeff Tollefson

Rift through Larsen C ice shelf has grown to 175 kilometers, and collapse of nearby ice shelves could offer a glimpse of its future

A movement to privatize Earth-observing satellites is gaining ground

Climate sceptic William Happer and ardent critic of academia David Gelernter have met with the president

Trump's nominee for Energy secretary says that he will base decisions on "sound science"

But Rex Tillerson, Trump’s nominee, tells senators that efforts to predict climate change are ‘very limited’

The system is helping scientists understand how quickly glaciers and ice sheets will melt, and how fast oceans will rise, as temperatures increase

Economic woes wrought by globalization are only part of the cause.

Researchers are studying the ocean’s carbon dynamics to improve predictions for sea level and temperature rise

Republicans sweep White House and U.S. Congress, with uncertain implications for research

A design flaw introduced during a recent upgrade could keep the reactor offline for at least a year

Presidential candidates begin to make clear their stark differences on climate change, energy production and stem cell research

John Holdren tells Nature about the highs and lows of nearly eight years in the White House

Forecasters warn that high ocean temperatures presage intense blazes in rainforest

US president pushed world to secure radioactive materials, but the threat of nuclear warfare — and terrorism — remains

Initiatives aim to measure global warming’s impact on high seas and deep currents

House science committee broadens scope of investigation into NOAA analysis that refuted global-warming ‘hiatus’

First of its kind study provides direct evidence of damage inflicted by rising carbon dioxide emissions

Researchers now argue that the warming slowdown was real

Research advocates worry that the president's budget proposal could backfire in the face of political opposition

The plan aims to decrease carbon dioxide produced by new airplanes

Two studies show how different tree species affect both carbon storage and local temperatures

Satellite measurements track burned gas by country as policy makers seek to reduce emissions

The new leader of the Intergovernmental Panel on Climate Change replaces Rajendra Pachauri

Questions are raised about conflict-of-interest disclosures by Willie Soon, employed by the Harvard-Smithsonian Center for Astrophysics