SKU: 42587728021

The Gravity Theory of Mass Extinction: A new unified theory of mass extinction explains the rise and fall of the dinosaurs

Sale price$29.21 Regular price$32.46
Save 10%

Pay in installments of $8.12 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

The Gravity Theory of Mass Extinction: A new unified theory of mass extinction explains the rise and fall of the dinosaursThe belief that some dinosaurs were so gigantic that they couldn't exist with today's gravity is a topic frequently discussed on internet websites. The opinion posted the most is that the Earth's mass must have changed significantly resulting in an alteration of surface gravity or that the Earth somehow expanded. Neither of these opinions have scientific support. The theory explained in this book, the GTME, does have that support. Readers familiar

The belief that some dinosaurs were so gigantic that they couldn't exist with today's gravity is a topic frequently discussed on internet websites. The opinion posted the most is that the Earth's mass must have changed significantly resulting in an alteration of surface gravity or that the Earth somehow expanded. Neither of these opinions have scientific support. The theory explained in this book, the GTME, does have that support.
Readers familiar with basic rotational physics understand that when there is a redistribution of mass within a rotating symmetrical object, like the Earth, there are two laws of physics that must be obeyed: the conservation of (1) rotational kinetic energy and (2) angular momentum. When the Earth's continents coalesced to form Pangea, their center of mass shifted south of the equator, an action which would have reduced (1) and (2). Something had to offset the above continental movement in order to conserve the two quantities described. That something was either the shifting of the Earth's core elements (inner/outer cores and densest lower mantle) away from Pangea or the increase in rotational velocity of the Earth (i.e., shortening of the day). The latter has not been detected during Pangea's existence.
Considerable circumstantial evidence supports the GTME. The most obvious is the existence of the largest dinosaurs, the sauropods. As Pangea broke apart and surface gravity increased the extinction of all non-avian dinosaurs, sea-going reptiles, ammonites, pterosaurs, etc., occurred. Core element movement is supported by the massive flood basalt volcanism of the Mesozoic and the two superchrons, the periods when magnetic pole reversal didn't occur.
The most powerful support for the GTME comes from the science of paleomagnetism. Paleomagnetists are split between support of the Pangea A vs. Pangea B models. Relying on the magnetic Geocentric Axial Dipole (GAD) model to reconstruct continental positions of Pangea they encountered a roadblock; the continents appeared to overlap. The GTME solves this problem because the shifting of the core elements from the Earth's geocenter mandates a non-GAD model. A recent study hypothesizes that geomagnetic pole reversals are directly linked to continental plate distribution; a concept already posited by the GTME! As explained in this book, many if not most of the mass extinctions were the result of changes in the Earth's surface gravity due to core element movement resulting from continental tectonic plate movement.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42587728021

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 14 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Nikki
Lexington, US
★★★★★ 5
Extremely comfortable with slight roomy fit
Size: 11, Color: Black/Geyser, Size: 11, Color: Black/Geyser
These are easily the most comfortable flip flops I have ever owned. From the moment I put them on, there was no break in period at all. They felt soft, supportive, and ready for all day wear right out of the box. The cushioning is excellent without feeling too soft, and they have a nice stable feel when walking. They are lightweight and clearly made with quality materials, making them great for everyday use or around water. One thing to note is that they run a little on the larger side, so if you are between sizes, you may want to consider sizing down for a better fit. Overall, these are a great combination of comfort, durability, and function. I would absolutely recommend them, especially if comfort is your top priority. (Excuse the teeth marks- my dog unfortunately got ahold of them before I snapped the photo- they are PERFECT out of the box)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
D
Daniel S
Lake Worth, US
★★★★★ 5
Comfortable Flip-Flops with a Clean, Sporty Look
Size: 13, Color: Black/Geyser
I picked up the Columbia Men’s PFG Castback Flip in the black and white colorway, and the first thing I noticed was how comfortable they felt right out of the box. How They’ve Been Used: Even though it’s still winter, I’ve been wearing them around the house occasionally to get a feel for the fit and comfort. I plan to use them more regularly outdoors once the weather warms up. What Worked Well: Immediate Comfort: The footbed feels cushioned and supportive without needing a break-in period. Secure Fit: The straps sit comfortably without rubbing or feeling stiff. Lightweight Design: Easy to slip on and off for quick wear. Clean Style: The black and white combination gives them a sharp, versatile look. Positive Feedback: My wife has already commented on how good they look. Things to Keep in Mind: Seasonal Use: Best suited for warmer weather and casual settings. Sizing: Checking the size guide helps ensure the right fit. Bottom Line: Based on my experience so far, these flip-flops offer a great balance of comfort and style. They’re comfortable enough for everyday wear and look sharp enough for casual outings. I’m looking forward to putting them to full use once spring arrives.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
E
Erik C
New York, US
★★★★★ 5
Columbia always makes great stuff
Size: 14, Color: Espresso II/Black
Even with my flat feet these offer a lot of padding which makes these extremely comfortable. They increase my height about an inch haha. These are great for walking around the beach or just going for walks. The tread on the bottom of these make walking up hills where the surfaces are not completely even extremely easy and very grippy. Time will tell how durable these are, but so far they're holding up very well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
J
JandJ
Chelsea, US
★★★★★ 5
Comfortable Lightweight Flip Flops with Reliable Grip
Size: 9, Color: Black/Geyser, Size: 9, Color: Black/Geyser
These flip flops have an excellent fit with a cushioned footbed that makes them very comfortable to wear for long periods. The grip is strong on wet surfaces, which adds confidence when walking around pools, beaches, or after rain. The overall quality feels top tier, and the color looks clean and well finished. They are lightweight, and the sizing was spot on, making them easy to slip on and wear throughout the day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
S
Sean Bozarth
Lowell, US
★★★★★ 5
Comfortable, Lightweight, and Easy for Everyday Wear
Size: 8, Color: Black/Geyser
I picked these up mainly for casual wear and beach days, and they’ve honestly been a great grab. They were comfortable right out of the box, which isn’t always the case with flip flops. The footbed has a little bit of cushion without feeling overly soft or flimsy. They feel supportive enough for running quick errands but still light and easy to slide on. The fit was true to size for me. They’re maybe slightly roomy in the toe area, but not in a way that bothers me. The straps don’t rub or dig in, which is usually my biggest concern with sandals like this. They also seem well made. The material feels durable and not cheap, and they have that simple Columbia look that works with shorts or just something casual around the house. Overall, solid pair of flips. Nothing flashy, just comfortable and reliable. I’d definitely buy them again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2026

recommand products