The Black Mamba Is Africa's Longest Venomous Snake

Kenyan environmentalist Wangari Maathai received the Nobel Peace Prize in 2004 for her contribution to sustainable development, democracy, and peace. She founded the Green Belt Movement in 1977, which mobilized poor rural women to plant trees, restore degraded land, and improve local livelihoods. Under her leadership, the movement planted over 51 million trees across Kenya. She was also the first woman in East and Central Africa to earn a doctoral degree.

A landmark 2013 study from the University of Pennsylvania found that, on average, female brains have stronger connections between the left and right hemispheres, while male brains tend to have stronger connections within each hemisphere. This may explain observed differences in performance: women consistently outperform men in memory and social cognition tests, while men tend to perform better on spatial perception tasks. However, most neuroscientists caution that individual variation is far greater than group differences.

Women outlive men by an average of 4–6 years globally, a gap observed in nearly every country in the world. In Japan, average female life expectancy exceeds 87 years. Scientists point to biological factors including two X chromosomes (which may buffer genetic defects), higher estrogen levels that protect cardiovascular health, and lower rates of risk-taking behavior. Social factors such as lower rates of smoking and alcohol consumption also contribute.

In 1952, British chemist Rosalind Franklin produced Photo 51 — a landmark X-ray diffraction image of DNA that revealed its helical structure. Her colleague Maurice Wilkins showed it without her permission to James Watson, who used it as a key piece of evidence in the Watson-Crick DNA model. Watson and Crick — along with Wilkins — received the 1962 Nobel Prize for the discovery. Franklin had died of cancer in 1958 and Nobel Prizes are not awarded posthumously. Her contribution went largely unacknowledged for decades.