Photo-sharing platform Instagram CEO Adam Mosseri has announced that Instagram is testing a new menu bar with a different layout of tabs. The new menu bar features dedicated tabs for two of the app's most popular features: Reels and DMs.

Users who have been selected for the trial will have their existing Instagram menu bar replaced with the new layout. In the new layout, the search tab will be replaced with Reels and Reels will be replaced with the search tab. While the tab dedicated to adding new posts will be replaced with the new DMs tab.

This Meta test includes an option to switch between the two tabs.

The announcement of this test makes it clear that it can take time to get used to these kinds of changes, so the new layout is currently being kept optional.

The zebra's white and black stripes have been an intriguing evolutionary puzzle in terms of biology.

According to today's scientific research, these stripes arose from a combination of several evolutionary factors, with the strongest evidence relating to the development of skin cells, temperature regulation, protection from mosquitoes and insects, and social identification.

1. Biological structure of stripes

The zebra's base color is actually black, and the white stripes are areas where melanin, the pigment-producing cells, is not produced.

During the embryo, the melanin-producing cells in the zebra's skin cells are activated or deactivated in specific ways. Where these cells are active, black stripes form. Where they are inactive, white stripes form.

All of this is determined by the interaction of genes and skin cells, specifically by a specific natural mechanism (similar to the stripes of a tiger or the spots of a leopard).

2. Evolutionary reasons

Scientists have put forward several theories, of which five stand out:

a) To repel insects and mosquitoes

Research has shown that tsetse flies and other blood-sucking mosquitoes are less likely to land on black-and-white striped bodies. These stripes change the polarization of light, which distracts the mosquitoes. This theory is considered the most widely accepted.

b) To control temperature

Black absorbs more heat, while white absorbs less. These subtle changes in temperature across the zebra's body create a gentle breeze that keeps the body cool. This is especially beneficial in hot African regions.

c) To confuse predators

When a herd of zebras is in motion, their stripes make it difficult for predators (lions, etc.) to judge distance and direction — this is called motion dazzle.

d) Social identity

Each zebra has a unique pattern of stripes, like human fingerprints. Through these stripes, zebras can recognize each other, mother and calf, or members of the herd.

e) Protection from parasites and infections

Some scientists believe that the stripes also protect against infection or insect eggs sticking to the skin.

3. Current scientific conclusion

According to various experimental evidence, zebra stripes are formed by a combination of several causes, but the strongest evidence favors "insect protection."

Sir John Gordon, the godfather of cloning and Nobel Prize winner in medicine, has died at the age of 92.

His death was confirmed by the Gordon Institute. However, the cause of death was not given. Sir John Gordon was born in Hampshire (UK) in 1933.

A statement issued by the institute, which he co-founded in 1991, said John was a visionary in the field of developmental biology. His work on nuclear transfer in frogs addressed one of the most fundamental questions in biology (whether genetic information is retained or lost during development) and paved the way for revolutionary innovations in biomedical research, from stem cell biology to mouse genetics and IVF.

John Gordon's research showed that the nuclei of adult cells can be reprogrammed to create a new organism. This research turned what was once considered a myth into reality in science.

'Environmental WhatsApp Chat Box' has been introduced for the first time in Pakistan.

According to details, the WhatsApp chat box, developed on the instructions of Chief Minister Maryam Nawaz Sharif, will answer citizens' questions.

The chat box, developed using cutting-edge technology, will answer every question citizens have about the environment, as well as provide advice on health safety.

On this occasion, the Chief Minister of Punjab congratulated the entire team for launching Pakistan's first 'Environment WhatsApp Chat Box'.

Maryam Nawaz Sharif said that modern technology is a gift to improve the lives of citizens and the environment. Environmental friendliness is actually philanthropy, every citizen is a participant in improving the quality of human life.

Senior Provincial Minister Marriyum Aurangzeb said that citizens will be able to stay informed about the air quality around them, the latest information about the environment and precautionary measures. The AI-powered chat box will keep citizens constantly informed about 'AQI'.

He said that citizens can avail the facility of WhatsApp chat box on number 03041373000. The WhatsApp chat box will provide citizens with news on weather and smog conditions and citizens will be able to stay safe from weather conditions by getting advance information before leaving home.

Maryam Aurangzeb said that Punjab is the first and only province in the country where modern technology is being used to improve environmental friendliness and air quality. The Punjab government has already introduced modern environmentally friendly machinery, while the government has already established a modern weather and smog monitoring and early warning system.

Google has introduced a free one-year AI Pro plan for students aged 18 and above in Pakistan.

According to the details, Google has announced that students in Pakistan who are 18 years of age or older can now get the Google AI Pro plan for free for one year.

It includes Google's advanced AI tools such as the Gemini 2.5 Pro model and the Deep Research feature, etc.

In addition, AI will also be integrated into other Google apps such as Gmail, Docs, Sheets, Slides, and Meet so that students can easily perform tasks such as email summarization, creating presentations, and data analysis.

It also includes other tools like Notebook LM, as well as video-making features like Veo 3 and Flow, which allow you to create videos from text or images.

The free plan will also include 2TB of cloud storage for storing data on Drive, Gmail, and Photos.

To get this Pro plan, students will have to apply or register, which will be available on Google's "Students Offer" or Gemini Student Offer page, where the plan can be activated after verifying student status.

Technology company Microsoft has warned its millions of users that they could be vulnerable to cyber attacks if they do not update their computers by next week.

Microsoft is set to end support for Windows 10 on October 14, a decade after its launch. This means that the operating system will no longer be protected from online threats.

Microsoft executive Youssef Mahdi said in a blog post that the company will no longer provide security and feature updates and technical support for Windows 10 computers.

They said that these devices will continue to function, but they will not be given regular security updates, which will increase the risk of cyber attacks.

According to the latest data from StatCounter Global Status, more than 40 percent of all Windows users are using an outdated operating system.

Yousef Mehdi said that applications running on Windows 10 will no longer receive support, which is why they will not receive feature updates. As a result, some apps may stop working.

Scientists in China have created a new type of battery that has the potential to change the way we power everything from our smartphones to electric vehicles.

The prototype, created by a team from the Dalian Institute of Chemical Physics in Liaoning, is a hydride-ion battery that offers several major advantages over traditional batteries.

Unlike lithium-ion batteries (which rely on a liquid electrolyte), these new devices use hydrogen ions that move through a solid medium.

This battery is lightweight and has the ability to provide energy. However, scientists are still facing difficulties in keeping these batteries stable at normal temperatures.

Which means that hydride-ion batteries only work at high temperatures, making them unsuitable for consumer use.

Note= This Contact Copy Express News

Scientists in China have created a cassette tape that can store all the songs ever recorded.

The team from the Southern University of Science and Technology in Guangdong Province, China, achieved this feat by printing synthetic DNA onto plastic tape and protecting it with 'crystal armor'.

These 100-metre-long DNA tapes can store 36 petabytes of data (the equivalent of 36,000 terabyte hard drives).

Given the increase in the amount of data globally, scientists said that this multi-storage method could be used as an alternative to traditional methods.

Researchers said that semiconductor-based non-volatile memory has reached the limit of Moore's Law, requiring new media to store extremely large amounts of data.

Note= This Contact Copy Express News