Recommended Free Tools
A fossilized tyrannosaurid foot bone bears 16 tooth marks that researchers interpret as evidence that a smaller tyrannosaurid fed on a much larger one. The most cautious explanation is scavenging after the larger animal had died—not a record of a juvenile killing it. Cannibalism is possible if both animals belonged to the same species, but the fossil does not settle that question.
What the fossil shows
The evidence comes from BDM 124, a partial left second metatarsal—a bone in the foot—found in Montana’s Judith River Formation. In a 2026 paper in Evolving Earth, Josephine Nielsen, Denver Fowler, Taia Wyenberg-Henzler, Aase Roland Jacobsen, and Christof Pearce describe 16 distinct tooth marks on the bone. Their analysis combines a Category-Modifier classification system, high-resolution 3D surface scanning, and measurements of the marks’ shapes and spacing. The authors conclude that the traces are consistent with feeding by a small tyrannosaurid on a significantly larger one. [c001]
As an Amazon Associate I earn from qualifying purchases.
This is trace-fossil evidence: the bone preserves marks attributed to feeding, not a scene of the two animals together. The study supports an interpretation of what happened to the carcass, but it does not show how the larger animal died or identify its killer.
Was it a baby T. rex?
“Baby” is an attention-grabbing shorthand, not an established age for the animal associated with BDM 124. The source material does not provide a precise age for it, and the study’s conclusion is framed around a smaller tyrannosaurid—not a newly hatched animal.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
A 2026 discussion in the Journal of Paleontology estimates the smaller animal at about 5.8 metres long and the larger adult at 10–12 metres. These are estimated lengths reported in that discussion, not direct measurements of living animals. They suggest a substantial size difference, but they do not establish that the smaller animal was a baby. [c002]
The evidence also does not establish that either animal was Tyrannosaurus rex. “Tyrannosaurid” refers to the broader family; the paper allows that the animals could have been the same species or closely related tyrannosaurids.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Why researchers favor scavenging over a kill
Tooth marks can be evidence of feeding, but they do not automatically mean an animal was attacked and killed by the tooth-maker. For BDM 124, the authors interpret the mark placement and morphology, along with the lack of healing, as consistent with feeding after the larger animal had died. They consider scavenging the most likely explanation. [c001] [c002]
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →- Feeding rather than an injury: The researchers identify the traces as tooth marks and analyze their form and arrangement as feeding evidence.
- Scavenging rather than a demonstrated kill: The marks are interpreted as late-stage carcass feeding; they do not preserve the moment of death.
- Smaller feeder, larger carcass: Mark dimensions and spacing support the inference that the feeder was smaller than the animal whose foot bone was marked.
How tooth marks can identify a feeder
Scientists compare the dimensions and spacing of fossil marks with tooth patterns and use surface measurements to characterize their shapes. In the BDM 124 study, 3D scanning and morphometric analysis helped researchers evaluate the marks’ geometry; the authors say the size and spacing fit a small tyrannosaurid. That is an inference from preserved traces, not a direct identification of an individual animal.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Attribution can remain uncertain even when marks are clearly related to feeding. The 2026 Journal of Paleontology discussion considers a different fossil, TMP 2022.007.0040, whose tooth-mark maker cannot be identified with certainty. If its maker were Albertosaurus, the feeding would count as cannibalism, but other possible makers are considered. [c002]
Does this count as cannibalism?
Only if the feeder and the animal it ate belonged to the same species. The BDM 124 interpretation is compatible with a smaller tyrannosaurid scavenging a larger member of its own species, but it also allows a closely related taxon. “Possible cannibalistic scavenging” is therefore more accurate than saying the fossil proves cannibalism.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
How this fits earlier tyrannosaur evidence
Other studies have documented tyrannosaur feeding traces, but they involve different fossils and do not add marks to BDM 124.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
- 2010: A PLOS ONE study described tooth marks on four Tyrannosaurus specimens and attributed them to other Tyrannosaurus. The authors interpreted the traces as feeding and argued that opportunistic scavenging was likely. They discussed whether smaller marks came from juvenile or subadult animals, while also considering whether they could have been left by smaller teeth farther back in the jaw of a large individual. [c004]
- 2019: A separate study compared marks on a vertebra with tooth dimensions and spacing across Tyrannosaurus growth stages, attributing them to a juvenile T. rex. Its comparison included the specimen “Jane,” estimated histologically at 11–12 years old; that age belongs to Jane, not the animal associated with BDM 124. [c005]
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
