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American Focus > Blog > Tech and Science > Sloths The Size of Elephants Roamed America, Before Abruptly Vanishing : ScienceAlert
Tech and Science

Sloths The Size of Elephants Roamed America, Before Abruptly Vanishing : ScienceAlert

Last updated: May 31, 2025 1:45 pm
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Sloths The Size of Elephants Roamed America, Before Abruptly Vanishing : ScienceAlert
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The Evolution and Extinction of Ancient Sloths

Imagine a time when massive Megatherium sloths roamed the Americas, standing as large as Asian elephants and tearing foliage off treetops with their prehensile tongues. These ancient sloths, some resembling grizzly bears but five times larger, were just one of over a hundred different sloth species that once inhabited the continent.

A recent study analyzing the DNA of 403 sloth fossils from museum collections has shed light on the evolutionary history of these fascinating creatures. The research revealed that the diverse sizes of ancient sloths were closely linked to the environmental conditions they experienced over 35 million years of evolution.

While modern sloths are well-adapted to their arboreal lifestyle with strong upper bodies and unique digestive systems, ancient sloth species such as Megatherium and Lestodon were too heavy to climb trees and instead roamed the ground with agility and faster metabolisms.

Some ground sloths even had osteoderms embedded in their skin for protection, similar to armadillos. One remarkable species, Thalassocnus, adapted to life between the Andes and the Pacific by foraging in the ocean, displaying characteristics akin to manatees.

Gigantism evolved multiple times in sloths, allowing them to survive into the Pleistocene ice ages. However, around 15,000 years ago, many sloth species disappeared, with human impacts likely playing a significant role in their extinction.

Unlike their ancient counterparts, modern sloth species have managed to avoid extinction, though two of the six remaining species are now listed as endangered. The rapid extinction of megafauna following human arrival is a global phenomenon that continues to threaten wildlife today.

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As we uncover more about the evolution and extinction of ancient sloths, it becomes clear that our actions play a crucial role in preserving the remaining species for future generations.

This research, published in Science, highlights the importance of conservation efforts to protect these unique and vulnerable creatures.

The COVID-19 pandemic has brought about significant changes to our daily lives, with many people now working from home and practicing social distancing. As a result, there has been a surge in the use of technology to stay connected with colleagues, friends, and family members.

One of the most popular forms of technology that has seen a dramatic increase in usage is video conferencing. Platforms such as Zoom, Microsoft Teams, and Google Meet have become essential tools for businesses and individuals alike to communicate and collaborate remotely.

Video conferencing has made it possible for teams to continue working together despite being physically apart. Meetings can be conducted virtually, allowing for real-time discussions, presentations, and decision-making. This has been especially important for businesses that have had to adapt to remote work setups to ensure continuity and productivity.

Aside from work-related meetings, video conferencing has also been used for social gatherings and events. Virtual happy hours, birthday parties, and even weddings have been conducted via video conferencing platforms, enabling people to stay connected and celebrate special occasions together while adhering to social distancing guidelines.

The convenience and accessibility of video conferencing have made it a preferred mode of communication for many. It eliminates the need for travel and allows participants to join meetings from the comfort of their own homes. This has not only saved time and money but has also reduced the carbon footprint associated with commuting to physical meetings.

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While video conferencing has many benefits, it also comes with its own set of challenges. Technical glitches, poor internet connections, and privacy concerns are some of the common issues that users may encounter. However, with proper preparation and troubleshooting, these challenges can be overcome to ensure smooth and effective communication.

As we navigate the new normal brought about by the COVID-19 pandemic, video conferencing has proven to be an invaluable tool for staying connected and productive. Its widespread adoption has not only facilitated remote work and social interactions but has also paved the way for a more flexible and efficient way of communicating in the future.

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