Science & technology
Waste not, want not
Most electric-car batteries could soon be made by recycling old ones
Mining for raw materials may peak by the mid-2030s
Long-standing mystery
How bush pigs saved Madagascar’s baobabs
Non-native species are not always harmful
Hot stuff
Geothermal energy could outperform nuclear power
Tricks from the oil industry have produced a hot-rocks breakthrough
Tests of time
The world’s first nuclear clock is on the horizon
It would be 1,000 times more accurate than today’s atomic timekeepers
White gold
Baby formulas now share some ingredients with breast milk
They may one day replicate its benefits
The motherlode
Breast milk’s benefits are not limited to babies
Some of its myriad components are being tested as treatments for cancer and other diseases
Radiation-belt remediation
Particles that damage satellites can be flushed out of orbit
All it takes is very long radio waves
See-through mice
A common food dye can make skin transparent
The discovery allows scientists to see inside live animals
Too darn hot
Fewer babies are born in the months following hot days
The effect is small but consistent
Cold comfort
New tech can make air-conditioning less harmful to the planet
The key is energy efficiency
Waste management
The noisome economics of dung beetles
They are worth millions a year to cattle ranchers