Science & Nature
Where Coyotes And Wolves Overlap In The United States
Coyotes and wolves overlap across the US, from Yellowstone and Denali to North Carolina's Albemarle Peninsula, where the two canids sometimes hybridize.
Jararaca
Jararaca, a venomous pit viper of South America, causes many of Brazil's snakebites and inspired the first ACE inhibitor blood-pressure medication.
Which Planet Has The Fewest Visitors From Earth?
Uranus and Neptune have each had exactly one visitor: Voyager 2, in 1986 and 1989. No spacecraft has returned to either ice giant since.
Wandering Albatross
Wandering Albatross, a giant seabird of the Southern Ocean, has the largest wingspan of any living bird and can glide for years over the open sea.
Malayan Blue Krait
Malayan Blue Krait, one of Southeast Asia's most venomous snakes, delivers a potent neurotoxic bite that can paralyze and kill without antivenom.
Which Moon Could Be Shooting Geysers Into Space?
Computer models hint at geysers erupting from Europa's icy crust, the kind already confirmed on Saturn's moon Enceladus. Europa Clipper arrives in 2030.
Why Mountain Lions Disappeared From The Eastern US
Mountain lions once roamed much of the eastern US, but bounties, hunting, fewer deer, and habitat loss eventually wiped out most populations.
Alligator Gar
Alligator Gar, one of North America's largest freshwater fish, is an ancient, armored predator named for its broad, toothy, alligator-like snout.
Red-Bellied Black Snake
Red-Bellied Black Snake, a glossy Australian elapid with a crimson underside, is venomous but notably shy, and rarely a serious danger to people.
What Happens If Kessler Syndrome Starts
One shattered satellite could start a chain reaction in orbit, multiplying debris until entire regions of space become too dangerous to use.
The Most Snake Infested Lakes in Missouri
Discover the most snake-infested lakes in Missouri, where diverse species, both venomous and non-venomous, make their homes in scenic waters.
Forest Cobra
Forest Cobra, the largest true cobra in Africa, is a fast, highly venomous snake at home in the rainforests and waterways across the continent.
Which Planet Has The Weakest Gravity?
Mercury has the weakest gravity of any planet. Its huge iron core still makes it pull harder than its small size suggests.
Killer Whale
Killer Whale, the ocean's top predator and the largest member of the dolphin family, hunts in tight-knit family pods across every sea on the planet.
Indian Cobra
Indian Cobra, the spectacled snake of snake charmers, is one of India's deadliest reptiles and a revered figure in Hindu mythology and folklore.
Why Doesn't the Moon Fall?
Gravity pulls the Moon toward Earth every second, yet it never lands. Tangential speed and Earth's curved surface turn that fall into a stable orbit.
Markhor
Markhor, the largest species of wild goat and the national animal of Pakistan, is famous for the long, corkscrew horns that spiral above its head.
Egyptian Cobra
Egyptian Cobra, one of Africa's largest and most venomous snakes, ranges across North African deserts and savannas and features in ancient Egyptian myth.
Which Planet Would Float On Water?
The massive planet of Saturn, a gas giant, has a density such that if you could place it in a giant tub of water, it would float.
Monocled Cobra
Monocled Cobra, named for the single ring on its hood, is a highly venomous snake of South and Southeast Asia often found near water and rice fields.
Where America Watches For Asteroids From
Mountaintop telescopes, a Cambridge clearinghouse, and JPL orbit specialists share the job of spotting asteroids early in America.
Blue Whale
Blue Whale, the largest animal ever known to have lived, is a colossal baleen whale that filter-feeds on tiny krill across the world's open oceans.
Which Moon Is The Coldest?
Triton is frozen almost beyond imagination, but Earth’s Moon hides an even colder secret inside craters untouched by sunlight.
Scientists Discover The World’s Largest Snake Species
The green anaconda, now recognized as a separate species, is the heaviest and possibly longest snake, reaching over 21 feet and 200 kg.
Rinkhals
Rinkhals, a ring-necked spitting cobra of southern Africa, can spray venom into an attacker's eyes and will even play dead to escape a serious threat.
Pronghorn
Pronghorn, the fastest land mammal in North America, is a horned animal of the open plains built for endurance and often mistaken for an antelope.
The K2-18b Biosignature Debate And What It Actually Means
Scientists found possible signs of life on K2-18b, but the evidence soon weakened. Here is what the latest research actually tells us.
Pygmy Hippopotamus
Pygmy Hippopotamus, a shy, forest-dwelling relative of the common hippo, is an endangered West African species far smaller than its famous cousin.
Which Planet Is The Densest?
Earth is the solar system's densest planet at 5.514 g/cm³. See how mass, volume, and rocky composition determine planetary density.
What Is The Most Volcanic World In The Solar System?
Io has at least 400 active volcanoes, throwing lava fountains dozens of miles high. The cause is not tectonics but Jupiter's gravity.
10 of the Fastest Snakes in the World
These ten snakes are some of the fastest in the world, using unique slithering and movement methods to hunt prey and get away from predators.
Javan Rhino
Javan Rhino is widely regarded as the rarest large mammal on Earth. About 50 survive, all inside one Indonesian national park and none in captivity.
Sumatran Rhino
Sumatran Rhino, the smallest living rhinoceros and the only Asian species with two horns, is a critically endangered relative of the woolly rhino.
What Is The Largest Object In The Solar System After The Sun?
Jupiter isn't just the biggest planet; it's the largest object in our Solar System after the Sun, 11 times wider than Earth.
Olive Sea Snake
The olive sea snake's "attacks" on divers aren't attacks at all. Discover the venomous Great Barrier Reef serpent and the surprising truth behind its behavior
Which Moon Is The Largest?
Ganymede outsizes the planet Mercury and hides an ocean that may hold more water than all the seas on Earth's surface.
Which Planet Is The Least Dense?
Lighter than water despite its size, Saturn measures a mere 0.69 g/cm3. Here is why the solar system heavyweight is really its lowest-density world.