Pink and green: Auroras light up night sky in Tasmania, Alaska

The Southern and Northern lights pulled off spectacular shows in the skies over Tasmania and Alaska earlier this week.

Illinois politicians to focus on clean energy bill Thursday

Supporters say it's a big boost for clean energy in Illinois, but critics say it includes what they call "the biggest utility rate increase" in state history.

Shedd Aquarium hosting cleanup efforts along lakefront
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Edward Warden, Shedd Conservation action coordinator, talks about their efforts to maintain a clean and robust lakefront.

Dolphin rescued after getting 'pushed into' canal by Hurricane Ida

A young dolphin was rescued and released back into the wild Sunday after Hurricane Ida pushed the mammal into a canal in Slidell, Louisiana.

Sensors provide a real-time glimpse at Chicago River quality

Quality of the 156-mile river system has improved in recent years, helped by multibillion-dollar construction of new reservoirs and underground tunnels.

New tool gauges water quality of the Chicago River in real time
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Alaina Harkness, executive director of Current, talks about their exciting new tool for monitoring the water quality of the Chicago River.

Harrowing report finds 1 in 3 tree species are under the threat of extinction
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Murphy Westwood, vice president of Science and Conservation at The Morton Arboretum, talks about the importance of saving tree species that are in danger of extinction.

Lake Huron sinkhole may hold secrets to how Earth got its oxygen

Scientists have discovered a previously unconsidered link between the length of daytime and the oxygen levels on Earth. Their theory was inspired by what they found at the bottom of Lake Huron.

Fall gardening tips for small urban yards
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Landscape expert Connie Rivera dishes out some tips for better gardening this fall in the Chicago area.

Star watchers, rejoice: Palos Preserves named largest Urban Night Sky Place in the world

The Palos Preserves comprises 6,600 acres and only has four buildings. Satellite data shows that it the area emits nearly 1,000 times less light than downtown Chicago, making it perfect for watching the stars.

Heat index could reach 110 degrees in some Chicago suburbs on Wednesday

DANGEROUS HEAT: Hot and humid conditions continue in the Chicago area on Wednesday, especially south of I-80 where a Heat Advisory is in effect. Expect temperatures to feel like it's close to 110 degrees.

Rain falls atop Greenland's ice sheet for first time on record

Greenland’s ice sheet experienced temperatures above freezing for about nine hours on Aug. 14, allowing rain to fall.

Wildfire smoke reaches North Pole for 1st time in recorded history

Smoke from dozens of wildfires burning in Russia reached the North Pole for the first time in recorded history, NASA said.