NASA's Juno probe sent back stunning images of our solar system's giant planet.
See more of the probe's stunning images here.
We'll never think of tapeworms the same way after seeing this monster from Nikon's Small World image contest, which celebrates microscopic photos.
See more prize-winning Small World images.
Natural events like the volcanic eruption of Bali's Mount Agung in November caused quite a stir.
The eruption sent ash 13,000 feet (4,000 meters) into the atmosphere and created plumes as high as 3.7 miles (6,000 meters).
Photographer Tim Flach published his new book "Endangered" with stunning images showing the faces of animals on the verge of extinction.
See more photos from Tim Flach's "Endangered".
This shot of Ruacana Falls in Northern Namibia won the International Landscape Photographer of the Year competition, which announced its winners in January.
See more of the winning photos.
The struggle to survive on Earth is encapsulated in this shot of killer whales suddenly appearing near a huddle of king penguins.
Check out more of the best photos taken by scientists in the past year.
The "Great American Eclipse" created a frenzy of excitement in August.
See more photos of the 2017 total solar eclipse.
This devastating photo shows a dehorned rhino that was killed by poachers. It took home the top prize from the 2017 Wildlife Photographer of the Year contest.
See more of the winning photos from the prestigious contest here.
This was the last full image the Cassini spacecraft captured of Saturn before plunging into the planet to end its mission.
Read the story of a scientist who spent 40 years studying the ringed planet.
Hurricane Irma tore through the Caribbean before hitting the Virgin Islands and Florida Keys in early September, kicking off the most intense September for hurricanes in recorded history.
Pollution issues returned this year. In this image, a massive flock of seagulls surrounded this boat on the Yamuna river in New Delhi, while the rest of the world was obscured by smog.
This was considered one of the best environmental photos taken by Reuters photographers this year.
Photos of the brilliant colors created by the Northern Lights never get old.
Auroras are unfortunately going dark in many parts of the world. The number of atmospheric light shows will decrease over the next several years due to an 11-year cycle of solar activity. The sun finished its last peak, called a solar maximum, in 2014. But around solar minimum — in 2020 or 2021 — the reverse will happen and auroras will get brighter.
Biplab Hazra shocked the world with this photo of elephants being attacked by a mob in West Bengal, India. The image won the Sanctuary Asia Wildlife Photography contest.
Learn more about the image and see more of the photos celebrated by the conservation organization.
In November, the Hubble Space Telescope captured the cosmic knot created by the merging of two galaxies in the Cancer constellation. It kind of puts everything in perspective.
A recent image created by Hubble added close to 100 previously undetected galaxies to our tally of what's out there in the void of space.
