"Phorusrhacids, colloquially known as terror birds, are an extinct clade of large carnivorousflightless birds that were the largest species of apex predators in South America during the Cenozoic era; their conventionally accepted temporal range covers from 62 to 1.8 million years ago." Source: Wikipedia.
Terror birds spread into North America around 2.7 million years ago after the formation of the Isthmus of Panama connected the two continents, leading to a cross-migration of flora and fauna known as the Great American Interchange.
It's possible that early humans coexisted with descendants of these monsters in South America. According to Wikipedia, "...reports from Uruguay of new findings of relatively small forms [of terror birds] dating to 18,000 and 96,000 years ago would imply that phorusrhacids survived there until very recently (i.e., until the late Pleistocene); the initial report of such a recent date has been questioned."
"Newspapers regularly carry stories of terrifying shark attacks, but in a paper published today, Oxford-led researchers reveal their discovery of a 3,000-year-old victim -- attacked by a shark in the Seto Inland Sea of the Japanese archipelago." Source: Science Daily.
"... The grim discovery of the victim was made by Oxford researchers, J. Alyssa White and Professor Rick Schulting, while investigating evidence for violent trauma on the skeletal remains of prehistoric hunter-gatherers at Kyoto University. They came upon No 24, from the previously excavated site of Tsukumo, an adult male riddled with traumatic injuries."
"The team concluded that the individual died more than 3,000 years ago, between 1370 to 1010 BC. The distribution of wounds strongly suggest the victim was alive at the time of attack; his left hand was sheared off, possibly a defence wound.
"Individual No 24's body had been recovered soon after the attack and buried with his people at the cemetery. Excavation records showed he was also missing his right leg and his left leg was placed on top of his body in an inverted position."
"The enormous, extinct shark Megalodon probably doesn't make you think of parenting and playdates. But a growing body of evidence suggests that these massive marine predators nurtured their babies by raising them in nurseries, and scientists just added five potential Megalodon nurseries to the list." Source: Live Science.
Comment: The Megalodon could still be out there, I suppose. According to Wikipedia, this monster shark "inhabited a wide range of marine environments (i.e., shallow coastal waters, areas of coastal upwelling, swampy coastal lagoons, sandy littorals, and offshore deep water environments)," so I suppose it could have adapted to the high pressure and darkness of deep ocean trenches. The Mariana Trench is a popular location because it's still mostly unexplored.
This is all nonsense, though. The Megalodon not only exists, but it isn't hiding in some dark trench. This supposedly extinct shark still feeds in coastal waters and it apparently has a taste of chicks in bikinis. We know the Megalodon is still out there because we have video proof from China. I have no idea why marine biologists are ignoring this footage.
"One Neanderthal child had a very bad day about 115,000 years ago. The child died — that much is certain — and the bones were gulped down and digested by a giant, prehistoric bird, according to archaeologists in Poland." Source: Live Science (2018).
"However, it's unclear whether the giant bird killed the child before the gruesome feast or whether the child died from another cause before the bird scavenged the remains, the archaeologists said."
Note: The bones, discovered in Ciemna Cave, one of several caves in Ojcow National Park in Poland, are "the oldest known human remains ever to be found in Poland." The bird that ate the child's bones isn't identified, which is too bad. I've got this picture of a Neanderthal kid wandering off from its cave and getting gobbled up by a huge terror bird, but the terror birds, unfortunately, lived in South America during a different time period.
"Despite the façade of modernity and a world under technical human control, being alone in the dark far from others can show us a different side of humanity. Alone in unfamiliar places we quickly become more cautious, more observant and sometimes even fearful. The genes that helped us survive a much more savage world still whisper to us the truth in the dark; we were prey before we were top predators." Source: Earth.com.
"Scientists have unearthed fossils in the United States of a big land-dwelling crocodile that lived about 231 million years ago, walked on its hind legs and was a top land predator right before the first dinosaurs appeared." Source: The Guardian.
"Transported back to the Triassic Period, what would a person experience upon encountering this agile, roughly 9-foot-long (about 3 meter-long), 5-foot-tall (about 1.5 meter-tall) beast with a long skull and blade-like teeth?
"'Abject terror,' said North Carolina State University paleontologist Lindsay Zanno, who led the research published in the journal Scientific Reports."
Comment: This bizarre and terrifying crocodile ancestor is called Carnufex carolinensis, which means "Carolina butcher". I know that Triassic-period monsters don't really fit in with the normal subjects covered by the Ancient World Review, but who cares? I can always find room for crocodiles that walked on two legs and had an "insatiable blood lust."
Note: "The prehistory of Australia is the period between the first human habitation of the Australian continent and the colonization of Australia in 1788 which marks the start of consistent documentation of Australia. This period is estimated to have lasted between 40,000 and 60,000 years." Source: Wikipedia.
"Prehistoric Australia had its share of giant creatures like the 'thunder bird' Genyornis and the bizarre Thylacoleo, a carnivorous marsupial the size of a lion, and the first humans who settled in Australia may have encountered Megalania, a huge predatory monitor lizard thought to have disappeared about 50,000 years ago. Also known as the 'giant ripper lizard,' Megalania is the largest terrestrial lizard known to have existed." (Wikipedia)
According to the BBC (2011), the venomous Megalania "could easily have caught prey of twice its own weight, and could have tackled animals of up to 10 times its own weight," so it wouldn't have had any trouble taking on a human being. Growing up to 23 feet long and weighing over a thousand pounds, "a fully grown giant ripper lizard would be able to tackle even the largest Diprotodon," a hippopotamus-sized marsupial. Aboriginal humans armed with little more than wooden spears would have had little chance against one of these predatory lizards.
It would be interesting to find out if some of the legends of the Australian aborigines could be traced back to prehistoric encounters with the Megalania. It's probably impossible to know, but Aboriginal mythology is full of creatures said to lurk in "swamps, billabongs [seasonal river channels], creeks, riverbeds, and waterholes." The Aborigines have at least two lizard deities: Adnoartina, the lizard guard of Uluru, and Mangar-kunjer-kunja, a lizard god who is thought to have created humans, but they hold protective and generative roles. If it's remembered at all, I'm guessing that Megalania would appear in Aboriginal legends as some kind of mythological monster.
"Egypt's Ministry of Antiquities says local archeologists have unearthed the mummy of an unusually large animal, most likely a lion or lioness." Source: Archaeology News Network.
"The ministry said on Monday the mummy was excavated in Saqqara, a town south of Cairo that was a vast necropolis in antiquity and is home to the famed Step Pyramid."
"Fossil animal droppings, charcoal from ancient fires and bone fragments litter the ground of one of the world's most important human evolution sites, new research reveals. A team of scientists have used modern geoarchaeological techniques to unearth new details of day-to-day life in the famous Denisova Cave complex in Siberia's Altai Mountains." Source: Science Daily.
"...The latest evidence from southern Siberia shows that large cave-dwelling carnivores once dominated the landscape, competing for more than 300,000 years with ancient tribes for prime space in cave shelters."
"In 2015, the frozen remains of two newborn P. spelaea cubs were found by researchers in Pleistocene-age permafrost in the Russian republic of Yakutia, Eastern Siberia. A third youngster was discovered in the same region in 2017, during mining works. The three small cubs were preserved in such pristine condition that scientists brought de-extinction [1] talks to the table." Source: The Vintage News (2018). More information here.
[1] De-extinction, aka resurrection biology or species revivalism, is a proposed process for bringing back extinct species or reviving endangered species, usually by cloning.
According to Wikipedia, the two cubs unearthed in 2015, "estimated to be between 25,000 and 55,000 years old, were discovered close to the Uyandina River in Yakutia, Siberia in permafrost. Research results indicate that the cubs were likely barely a week old at the time of their deaths, as their milk teeth had not fully erupted. Further evidence shows the cubs were hidden at a den site until they were old enough to join the pride. Researchers think that the cubs were trapped and killed by a landslide, and that without air, the cubs were preserved in such good condition. A second expedition to the site where the cubs were found was planned for 2016, in hopes of finding either the remains of a third cub or possibly the cubs' mother."
A third well-preserved cave lion cub was discovered at a different location in 2017. According to the Siberian Times (Nov. 2017), "[t]he prehistoric animal was found in permafrost on the bank of Tirekhtykh River of the Abyisky district of Yakutia by a local resident Boris Berezhnov." The remains, thought to be around 50,000 years old, are also so well-preserved that there has been talk of trying to clone the animal.
Note: Chirpy pop-science presenters are an abomination.
One part of the story which is missing from most of the mass media reports is that the third "cave lion cub" may not be a cave lion after all:
"A Russian man hunting for mammoth tusks in Eastern Siberia made an unexpected discovery in September: the incredibly furry, slightly squished mummy of a cat from the last ice age. Scientists are celebrating the rare discovery, but they're not certain on one major point — whether the mummy is a cave lion cub or a lynx kitten, paleontologists told Live Science." Source: Live Science (2017). It's possible that the cub is a prehistoric Eurasian lynx. I'm not sure where the question stands as of Oct. 2018.
Cloning these cave lions or lynxes or whatever they were probably isn't possible, at least in the foreseeable future, according to several experts quoted by Live Science.