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Plus how much you should be drinking per day.
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The giant triton sea snail loves eating crown of thorns starfish.
TOPSHOT - A man walks on a street covered in debris after hurricane Irma hurricane passed on the French island of Saint-Martin, near Marigot on September 8, 2017. Officials on the island of Guadeloupe, where French aid efforts are being coordinated, suspended boat crossings to the hardest-hit territories of St Martin and St Barts where 11 people have died. Two days after Hurricane Irma swept over the eastern Caribbean, killing at least 17 people and devastating thousands of homes, some islands braced for a second battering from Hurricane Jose this weekend. / AFP PHOTO / Martin BUREAU (Photo credit should read MARTIN BUREAU/AFP/Getty Images)
Conservationists are outraged over the Federal Government's draft plans for 44 Australian marine parks, saying it almost halves the protections set five years ago. Under the new proposal, mid-water tr...
Before Hurricane Irma
Check out HuffPost's Hurricane Irma live blog for the latest updates on the storm. Hurricane Irma left behind death and destruction on several Caribbean islands after a nearly weeklong rampage across...
MIAMI, FL - SEPTEMBER 10: A TV reporter braces against the wind and walking towards safety, as Hurricane Irma approaches in Miami, Fla., on Sept. 10, 2017. (Photo by Marcus Yam / Los Angeles Times via Getty Images)
Hurricane Irma has been making headlines as the storm moved north from the Caribbean towards mainland USA last week, leaving behind a trail of destruction and months of rebuilding for residents. On th...
Carlos Barria / Reuters
Hurricane Irma has brought devastation to Florida, with streets flooded, homes and businesses out of power, and trees uprooted by high winds which peaked at 130mph. At least three people are reported...
Dark clouds are seen over Miami's skyline before the arrival of Hurricane Irma to south Florida, U.S. September 9, 2017. REUTERS/Carlos Barria
The category four storm has made landfall in the U.S.
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MIRAMAR, Fla. ― Hurricane Irma slammed into the Lower Florida Keys Sunday morning, unleashing severe winds and storm surge on its path toward the state's west coast. Irma was bearing down on Florida a...
TOPSHOT - An Indian boy pulls his bicycle through a flooded street during heavy rain showers in Mumbai on August 29, 2017.Heavy rain brought India's financial capital Mumbai to a virtual standstill on August 29, flooding streets, causing transport chaos and prompting warnings to stay indoors. Dozens of flights and local train services were cancelled as rains lashed the coastal city of nearly 20 million people. / AFP PHOTO / PUNIT PARANJPE (Photo credit should read PUNIT PARANJPE/AFP/Getty Images)
The U.S. was closely followed by Lebanon and India
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The most powerful storm to hit the United States in more than a decade has led to at least 20 deaths, left parts of Texas and Louisiana submerged by floodwater and caused billions of dollars in damage...
An aviation expert finds it "perplexing" authorities aren't reacting to new evidence.
New reports have found 12 "probably man-made" objects in the Indian Ocean.
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More than 800 million people live without access to a safe water supply.
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The amount depends on your body size, activity level and the weather.
The review comes after a week of public outcry in response to serious allegations aired by Four Corners.
The water wars have begun.
An employee walks past storage tanks for contaminated water at the Tokyo Electric Power Co.'s Fukushima Dai-ichi nuclear power plant in Okuma last February.
The world's greatest Olympian versus a Great White predator.
Several dozen people are seen forming a human chain to rescue swimmers that got caught in a rip current off Florida's coast over the weekend.
In a potentially major milestone in the cleanup effort of Japan's Fukushima nuclear plant, an underwater robot has captured what's believed to be the first images of melted nuclear fuel inside one of...
An image released by NASA in November of the rift in the Larsen C ice shelf.
An estimated 80 people waded into the water to rescue nine others that became trapped.
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WASHINGTON — When it splits off, the Delaware-sized chunk of ice now barely clinging to one of Antarctica's largest ice shelves will become one of the most massive icebergs in recorded history,...
'There has been an increase in the amount of decay we are seeing in children.'
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This story is part of a series on ocean plastics. Artist Benjamin Von Wong is drawing attention to an ugly problem with some beautiful pictures. Von Wong's mermaid photo series, which he staged and sh...
The long-term survival of the population is now at risk.
STR New / Reuters
It's time to 'shellebrate.'
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But the nation's Ministry of Energy has poured cold water on the idea.
This story is part of a series on ocean plastics. The oceans are teeming with plastic trash: shopping bags, water bottles, old toothbrushes, and much more. By 2020, there will bemore plastic than fish...
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Plastics are flooding into the oceans. But you can help.
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The numbers are staggering, and they'll get worse if we do nothing.
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"Laeticia died doing something that she loved."
The 17-year-old was surfing with her father when the animal struck.